%{
//
// cs-parser.jay: The Parser for the C# compiler
//
// Authors: Miguel de Icaza (miguel@gnu.org)
// Ravi Pratap (ravi@ximian.com)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
//
// TODO:
// (1) Figure out why error productions dont work. `type-declaration' is a
// great spot to put an `error' because you can reproduce it with this input:
// "public X { }"
//
// Possible optimization:
// Run memory profiler with parsing only, and consider dropping
// arraylists where not needed. Some pieces can use linked lists.
//
using System.Text;
using System.IO;
using System;
namespace Mono.CSharp
{
using System.Collections;
///
/// The C# Parser
///
public class CSharpParser {
NamespaceEntry current_namespace;
TypeContainer current_container;
IIteratorContainer iterator_container;
///
/// Current block is used to add statements as we find
/// them.
///
Block current_block;
///
/// If true, creates a toplevel block in the block production
/// This is flagged by the delegate creation
///
bool create_toplevel_block;
///
///
/// Current interface is used by the various declaration
/// productions in the interface declaration to "add"
/// the interfaces as we find them.
///
Interface current_interface;
Delegate current_delegate;
///
/// This is used by the unary_expression code to resolve
/// a name against a parameter.
///
Parameters current_local_parameters;
///
/// Using during property parsing to describe the implicit
/// value parameter that is passed to the "set" and "get"accesor
/// methods (properties and indexers).
///
Expression implicit_value_parameter_type;
Parameters indexer_parameters;
///
/// Used to determine if we are parsing the get/set pair
/// of an indexer or a property
///
bool parsing_indexer;
///
/// An out-of-band stack.
///
Stack oob_stack;
///
/// Switch stack.
///
Stack switch_stack;
public bool yacc_verbose_flag;
// Name of the file we are parsing
public string name;
///
/// The current file.
///
SourceFile file;
/// Current attribute target
string current_attr_target;
/// assembly and module attribute definition is enabled
bool global_attrs_enabled = true;
%}
%token EOF
%token NONE /* This token is never returned by our lexer */
%token ERROR // This is used not by the parser, but by the tokenizer.
// do not remove.
/*
*These are the C# keywords
*/
%token FIRST_KEYWORD
%token ABSTRACT
%token AS
%token ADD
%token ASSEMBLY
%token BASE
%token BOOL
%token BREAK
%token BYTE
%token CASE
%token CATCH
%token CHAR
%token CHECKED
%token CLASS
%token CONST
%token CONTINUE
%token DECIMAL
%token DEFAULT
%token DELEGATE
%token DO
%token DOUBLE
%token ELSE
%token ENUM
%token EVENT
%token EXPLICIT
%token EXTERN
%token FALSE
%token FINALLY
%token FIXED
%token FLOAT
%token FOR
%token FOREACH
%token GOTO
%token IF
%token IMPLICIT
%token IN
%token INT
%token INTERFACE
%token INTERNAL
%token IS
%token LOCK
%token LONG
%token NAMESPACE
%token NEW
%token NULL
%token OBJECT
%token OPERATOR
%token OUT
%token OVERRIDE
%token PARAMS
%token PRIVATE
%token PROTECTED
%token PUBLIC
%token READONLY
%token REF
%token RETURN
%token REMOVE
%token SBYTE
%token SEALED
%token SHORT
%token SIZEOF
%token STACKALLOC
%token STATIC
%token STRING
%token STRUCT
%token SWITCH
%token THIS
%token THROW
%token TRUE
%token TRY
%token TYPEOF
%token UINT
%token ULONG
%token UNCHECKED
%token UNSAFE
%token USHORT
%token USING
%token VIRTUAL
%token VOID
%token VOLATILE
%token WHERE
%token WHILE
/* C# keywords which are not really keywords */
%token GET "get"
%token SET "set"
%left LAST_KEYWORD
/* C# single character operators/punctuation. */
%token OPEN_BRACE "{"
%token CLOSE_BRACE "}"
%token OPEN_BRACKET "["
%token CLOSE_BRACKET "]"
%token OPEN_PARENS "("
%token CLOSE_PARENS ")"
%token DOT "."
%token COMMA ","
%token COLON ":"
%token SEMICOLON ";"
%token TILDE "~"
%token PLUS "+"
%token MINUS "-"
%token BANG "!"
%token ASSIGN "="
%token OP_LT "<"
%token OP_GENERICS_LT "<"
%token OP_GT ">"
%token OP_GENERICS_GT ">"
%token BITWISE_AND "&"
%token BITWISE_OR "|"
%token STAR "*"
%token PERCENT "%"
%token DIV "/"
%token CARRET "^"
%token INTERR "?"
/* C# multi-character operators. */
%token OP_INC "++"
%token OP_DEC "--"
%token OP_SHIFT_LEFT "<<"
%token OP_SHIFT_RIGHT ">>"
%token OP_LE "<="
%token OP_GE ">="
%token OP_EQ "=="
%token OP_NE "!="
%token OP_AND "&&"
%token OP_OR "||"
%token OP_MULT_ASSIGN "*="
%token OP_DIV_ASSIGN "/="
%token OP_MOD_ASSIGN "%="
%token OP_ADD_ASSIGN "+="
%token OP_SUB_ASSIGN "-="
%token OP_SHIFT_LEFT_ASSIGN "<<="
%token OP_SHIFT_RIGHT_ASSIGN ">>="
%token OP_AND_ASSIGN "&="
%token OP_XOR_ASSIGN "^="
%token OP_OR_ASSIGN "|="
%token OP_PTR "->"
/* Numbers */
%token LITERAL_INTEGER "int literal"
%token LITERAL_FLOAT "float literal"
%token LITERAL_DOUBLE "double literal"
%token LITERAL_DECIMAL "decimal literal"
%token LITERAL_CHARACTER "character literal"
%token LITERAL_STRING "string literal"
%token IDENTIFIER
%token CLOSE_PARENS_CAST
%token CLOSE_PARENS_NO_CAST
%token CLOSE_PARENS_OPEN_PARENS
%token CLOSE_PARENS_MINUS
%token DEFAULT_OPEN_PARENS
/* Add precedence rules to solve dangling else s/r conflict */
%nonassoc LOWPREC
%nonassoc IF
%nonassoc ELSE
%right ASSIGN
%left OP_OR
%left OP_AND
%left BITWISE_OR
%left BITWISE_AND
%left OP_SHIFT_LEFT OP_SHIFT_RIGHT
%left PLUS MINUS
%left STAR DIV PERCENT
%right BANG CARRET UMINUS
%nonassoc OP_INC OP_DEC
%left OPEN_PARENS
%left OPEN_BRACKET OPEN_BRACE
%left DOT
%nonassoc HIGHPREC
%start compilation_unit
%%
compilation_unit
: outer_declarations opt_EOF
| outer_declarations global_attributes opt_EOF
| global_attributes opt_EOF
| opt_EOF /* allow empty files */
;
opt_EOF
: /* empty */
| EOF
;
outer_declarations
: outer_declaration
| outer_declarations outer_declaration
;
outer_declaration
: using_directive
| namespace_member_declaration
;
using_directives
: using_directive
| using_directives using_directive
;
using_directive
: using_alias_directive
| using_namespace_directive
;
using_alias_directive
: USING IDENTIFIER ASSIGN
namespace_or_type_name SEMICOLON
{
current_namespace.UsingAlias ((string) $2, (TypeName) $4, lexer.Location);
}
| USING error {
CheckIdentifierToken (yyToken);
}
;
using_namespace_directive
: USING namespace_name SEMICOLON
{
current_namespace.Using ((string) $2, lexer.Location);
}
;
//
// Strictly speaking, namespaces don't have attributes but
// we parse global attributes along with namespace declarations and then
// detach them
//
namespace_declaration
: opt_attributes NAMESPACE namespace_name
{
if ($1 != null) {
Report.Error(1518, Lexer.Location, "Attributes cannot be applied to namespaces."
+ " Expected class, delegate, enum, interface, or struct");
}
current_namespace = RootContext.Tree.RecordNamespace (current_namespace, file, (string) $3, lexer.Location);
}
namespace_body opt_semicolon
{
current_namespace = current_namespace.Parent;
}
;
opt_semicolon
: /* empty */
| SEMICOLON
;
opt_comma
: /* empty */
| COMMA
;
namespace_name
: namespace_or_type_name {
TypeName name = (TypeName) $1;
if (name.TypeArguments != null)
syntax_error (lexer.Location, "namespace name expected");
$$ = name.GetName ();
}
;
namespace_body
: OPEN_BRACE
opt_using_directives
opt_namespace_member_declarations
CLOSE_BRACE
{
}
;
opt_using_directives
: /* empty */
| using_directives
;
opt_namespace_member_declarations
: /* empty */
| namespace_member_declarations
;
namespace_member_declarations
: namespace_member_declaration
| namespace_member_declarations namespace_member_declaration
;
namespace_member_declaration
: type_declaration
{
string name = "";
int mod_flags;
if ($1 is Class){
Class c = (Class) $1;
mod_flags = c.ModFlags;
name = c.Name;
} else if ($1 is Struct){
Struct s = (Struct) $1;
mod_flags = s.ModFlags;
name = s.Name;
} else
break;
if ((mod_flags & (Modifiers.PRIVATE|Modifiers.PROTECTED)) != 0){
Report.Error (
1527, lexer.Location,
"Namespace elements cant be explicitly " +
"declared private or protected in `" + name + "'");
}
current_namespace.DeclarationFound = true;
}
| namespace_declaration {
current_namespace.DeclarationFound = true;
}
| field_declaration {
Report.Error (116, lexer.Location, "A namespace can only contain types and namespace declarations");
}
| method_declaration {
Report.Error (116, lexer.Location, "A namespace can only contain types and namespace declarations");
}
;
type_declaration
: class_declaration
| struct_declaration
| interface_declaration
| enum_declaration
| delegate_declaration
//
// Enable this when we have handled all errors, because this acts as a generic fallback
//
// | error {
// Console.WriteLine ("Token=" + yyToken);
// Report.Error (1518, lexer.Location, "Expected class, struct, interface, enum or delegate");
// }
;
//
// Attributes 17.2
//
global_attributes
: attribute_sections
{
if ($1 != null)
CodeGen.Assembly.AddAttributes (((Attributes)$1).Attrs);
$$ = $1;
}
opt_attributes
: /* empty */
{
global_attrs_enabled = false;
$$ = null;
}
| attribute_sections
{
global_attrs_enabled = false;
$$ = $1;
}
;
attribute_sections
: attribute_section
{
ArrayList sect = (ArrayList) $1;
if (global_attrs_enabled) {
if (current_attr_target == "module") {
CodeGen.Module.AddAttributes (sect);
$$ = null;
} else if (current_attr_target == "assembly") {
CodeGen.Assembly.AddAttributes (sect);
$$ = null;
} else {
$$ = new Attributes (sect);
}
} else {
$$ = new Attributes (sect);
}
current_attr_target = null;
}
| attribute_sections attribute_section
{
Attributes attrs = $1 as Attributes;
ArrayList sect = (ArrayList) $2;
if (global_attrs_enabled) {
if (current_attr_target == "module") {
CodeGen.Module.AddAttributes (sect);
$$ = null;
} else if (current_attr_target == "assembly") {
CodeGen.Assembly.AddAttributes (sect);
$$ = null;
} else {
if (attrs == null)
attrs = new Attributes (sect);
else
attrs.AddAttributes (sect);
}
} else {
if (attrs == null)
attrs = new Attributes (sect);
else
attrs.AddAttributes (sect);
}
$$ = attrs;
current_attr_target = null;
}
;
attribute_section
: OPEN_BRACKET attribute_target_specifier attribute_list opt_comma CLOSE_BRACKET
{
$$ = $3;
}
| OPEN_BRACKET attribute_list opt_comma CLOSE_BRACKET
{
$$ = $2;
}
;
attribute_target_specifier
: attribute_target COLON
{
current_attr_target = (string)$1;
$$ = $1;
}
;
attribute_target
: IDENTIFIER
{
CheckAttributeTarget ((string) $1);
$$ = $1;
}
| EVENT { $$ = "event"; }
| RETURN { $$ = "return"; }
;
attribute_list
: attribute
{
ArrayList attrs = new ArrayList (4);
attrs.Add ($1);
$$ = attrs;
}
| attribute_list COMMA attribute
{
ArrayList attrs = (ArrayList) $1;
attrs.Add ($3);
$$ = attrs;
}
;
attribute
: attribute_name
{
$$ = lexer.Location;
}
opt_attribute_arguments
{
//
// Attributes need a string, not an expression: generic types will fail here.
//
if (current_attr_target == "assembly" || current_attr_target == "module")
$$ = new GlobalAttribute (current_container, current_attr_target,
((Expression) $1).ToString (),
(ArrayList) $3, (Location) $2);
else
$$ = new Attribute (current_attr_target, ((Expression) $1).ToString (),
(ArrayList) $3, (Location) $2);
}
;
attribute_name
: type_name { /* reserved attribute name or identifier: 17.4 */ }
;
opt_attribute_arguments
: /* empty */ { $$ = null; }
| OPEN_PARENS attribute_arguments CLOSE_PARENS
{
$$ = $2;
}
;
attribute_arguments
: opt_positional_argument_list
{
if ($1 == null)
$$ = null;
else {
ArrayList args = new ArrayList (4);
args.Add ($1);
$$ = args;
}
}
| positional_argument_list COMMA named_argument_list
{
ArrayList args = new ArrayList (4);
args.Add ($1);
args.Add ($3);
$$ = args;
}
| named_argument_list
{
ArrayList args = new ArrayList (4);
args.Add (null);
args.Add ($1);
$$ = args;
}
;
opt_positional_argument_list
: /* empty */ { $$ = null; }
| positional_argument_list
;
positional_argument_list
: expression
{
ArrayList args = new ArrayList (4);
args.Add (new Argument ((Expression) $1, Argument.AType.Expression));
$$ = args;
}
| positional_argument_list COMMA expression
{
ArrayList args = (ArrayList) $1;
args.Add (new Argument ((Expression) $3, Argument.AType.Expression));
$$ = args;
}
;
named_argument_list
: named_argument
{
ArrayList args = new ArrayList (4);
args.Add ($1);
$$ = args;
}
| named_argument_list COMMA named_argument
{
ArrayList args = (ArrayList) $1;
args.Add ($3);
$$ = args;
}
;
named_argument
: IDENTIFIER ASSIGN expression
{
$$ = new DictionaryEntry (
(string) $1,
new Argument ((Expression) $3, Argument.AType.Expression));
}
;
class_body
: OPEN_BRACE opt_class_member_declarations CLOSE_BRACE
;
opt_class_member_declarations
: /* empty */
| class_member_declarations
;
class_member_declarations
: class_member_declaration
| class_member_declarations
class_member_declaration
;
class_member_declaration
: constant_declaration // done
| field_declaration // done
| method_declaration // done
| property_declaration // done
| event_declaration // done
| indexer_declaration // done
| operator_declaration // done
| constructor_declaration // done
| destructor_declaration // done
| type_declaration
;
struct_declaration
: opt_attributes
opt_modifiers
STRUCT member_name
{
Struct new_struct;
MemberName full_struct_name = MakeName ((MemberName) $4);
new_struct = new Struct (current_namespace, current_container, full_struct_name,
(int) $2, (Attributes) $1, lexer.Location);
current_container = new_struct;
RootContext.Tree.RecordDecl (full_struct_name.GetName (true), new_struct);
lexer.ConstraintsParsing = true;
}
opt_class_base
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
}
struct_body
opt_semicolon
{
Struct new_struct = (Struct) current_container;
CheckDef (new_struct.SetParameterInfo ((ArrayList) $7), new_struct.Name, new_struct.Location);
if ($6 != null)
new_struct.Bases = (ArrayList) $6;
current_container = current_container.Parent;
CheckDef (current_container.AddStruct (new_struct), new_struct.Name, new_struct.Location);
$$ = new_struct;
}
| opt_attributes opt_modifiers STRUCT error {
CheckIdentifierToken (yyToken);
}
;
struct_body
: OPEN_BRACE opt_struct_member_declarations CLOSE_BRACE
;
opt_struct_member_declarations
: /* empty */
| struct_member_declarations
;
struct_member_declarations
: struct_member_declaration
| struct_member_declarations struct_member_declaration
;
struct_member_declaration
: constant_declaration
| field_declaration
| method_declaration
| property_declaration
| event_declaration
| indexer_declaration
| operator_declaration
| constructor_declaration
| type_declaration
/*
* This is only included so we can flag error 575:
* destructors only allowed on class types
*/
| destructor_declaration
;
constant_declaration
: opt_attributes
opt_modifiers
CONST
type
constant_declarators
SEMICOLON
{
foreach (VariableDeclaration constant in (ArrayList) $5){
Location l = constant.Location;
Const c = new Const (
(Expression) $4, (string) constant.identifier,
(Expression) constant.expression_or_array_initializer, (int) $2,
(Attributes) $1, l);
CheckDef (current_container.AddConstant (c), c.Name, l);
}
}
;
constant_declarators
: constant_declarator
{
ArrayList constants = new ArrayList (4);
constants.Add ($1);
$$ = constants;
}
| constant_declarators COMMA constant_declarator
{
ArrayList constants = (ArrayList) $1;
constants.Add ($3);
}
;
constant_declarator
: IDENTIFIER ASSIGN constant_expression
{
$$ = new VariableDeclaration ((string) $1, $3, lexer.Location);
}
;
field_declaration
: opt_attributes
opt_modifiers
type
variable_declarators
SEMICOLON
{
Expression type = (Expression) $3;
int mod = (int) $2;
foreach (VariableDeclaration var in (ArrayList) $4){
Location l = var.Location;
Field field = new Field (type, mod, var.identifier,
var.expression_or_array_initializer,
(Attributes) $1, l);
CheckDef (current_container.AddField (field), field.Name, l);
}
}
| opt_attributes
opt_modifiers
VOID
variable_declarators
SEMICOLON {
Report.Error (670, lexer.Location, "void type is not allowed for fields");
}
;
variable_declarators
: variable_declarator
{
ArrayList decl = new ArrayList (4);
decl.Add ($1);
$$ = decl;
}
| variable_declarators COMMA variable_declarator
{
ArrayList decls = (ArrayList) $1;
decls.Add ($3);
$$ = $1;
}
;
variable_declarator
: IDENTIFIER ASSIGN variable_initializer
{
$$ = new VariableDeclaration ((string) $1, $3, lexer.Location);
}
| IDENTIFIER
{
$$ = new VariableDeclaration ((string) $1, null, lexer.Location);
}
;
variable_initializer
: expression
{
$$ = $1;
}
| array_initializer
{
$$ = $1;
}
| STACKALLOC type OPEN_BRACKET expression CLOSE_BRACKET
{
$$ = new StackAlloc ((Expression) $2, (Expression) $4, lexer.Location);
}
;
method_declaration
: method_header {
iterator_container = (IIteratorContainer) $1;
}
method_body
{
Method method = (Method) $1;
Block b = (Block) $3;
const int extern_abstract = (Modifiers.EXTERN | Modifiers.ABSTRACT);
if (b == null){
if ((method.ModFlags & extern_abstract) == 0){
Report.Error (
501, lexer.Location, current_container.MakeName (method.Name) +
"must declare a body because it is not marked abstract or extern");
}
} else {
if ((method.ModFlags & Modifiers.EXTERN) != 0){
Report.Error (
179, lexer.Location, current_container.MakeName (method.Name) +
" is declared extern, but has a body");
}
}
method.Block = (Block) $3;
CheckDef (current_container.AddMethod (method), method.Name, method.Location);
current_local_parameters = null;
iterator_container = null;
}
;
opt_error_modifier
: /* empty */
| modifiers
{
int m = (int) $1;
int i = 1;
while (m != 0){
if ((i & m) != 0){
Report.Error (
1585, lexer.Location, "Member modifier `" +
Modifiers.Name (i) + "' must precede member type and name");
}
m &= ~i;
i = i << 1;
}
}
;
method_header
: opt_attributes
opt_modifiers
type namespace_or_type_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
lexer.ConstraintsParsing = true;
}
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
TypeName type_name = (TypeName) $4;
MemberName name = type_name.GetMemberName ();
if ($9 != null && name.TypeParameters == null)
Report.Error (80, lexer.Location,
"Contraints are not allowed on non-generic declarations");
Method method;
GenericMethod generic = null;
if (name.TypeParameters != null) {
generic = new GenericMethod (current_namespace, current_container,
name, (Attributes) $1, lexer.Location);
CheckDef (generic.SetParameterInfo ((ArrayList) $9), name.Name, lexer.Location);
method = new Method (generic, (Expression) $3, (int) $2, false, name,
(Parameters) $6, (Attributes) $1, lexer.Location);
} else
method = new Method (current_container, (Expression) $3, (int) $2,
false, name, (Parameters) $6, (Attributes) $1,
lexer.Location);
current_local_parameters = (Parameters) $6;
$$ = method;
}
| opt_attributes
opt_modifiers
VOID namespace_or_type_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
lexer.ConstraintsParsing = true;
}
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
TypeName type_name = (TypeName) $4;
MemberName name = type_name.GetMemberName ();
if ($9 != null && name.TypeParameters == null)
Report.Error (80, lexer.Location,
"Contraints are not allowed on non-generic declarations");
Method method;
GenericMethod generic = null;
if (name.TypeParameters != null) {
generic = new GenericMethod (current_namespace, current_container,
name, (Attributes) $1, lexer.Location);
CheckDef (generic.SetParameterInfo ((ArrayList) $9), name.Name, lexer.Location);
method = new Method (generic, TypeManager.system_void_expr, (int) $2,
false, name, (Parameters) $6, (Attributes) $1,
lexer.Location);
} else
method = new Method (current_container, TypeManager.system_void_expr,
(int) $2, false, name, (Parameters) $6,
(Attributes) $1, lexer.Location);
current_local_parameters = (Parameters) $6;
$$ = method;
}
| opt_attributes
opt_modifiers
type
modifiers namespace_or_type_name OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
Report.Error (1585, lexer.Location,
String.Format ("Modifier {0} should appear before type",
Modifiers.Name ((int) $4)));
TypeName type_name = (TypeName) $4;
MemberName name = type_name.GetMemberName ();
Method method = new Method (current_container, TypeManager.system_void_expr,
0, false, name, (Parameters) $6, (Attributes) $1,
lexer.Location);
current_local_parameters = (Parameters) $6;
$$ = method;
}
;
method_body
: block
| SEMICOLON { $$ = null; }
;
opt_formal_parameter_list
: /* empty */ { $$ = Parameters.EmptyReadOnlyParameters; }
| formal_parameter_list
;
formal_parameter_list
: fixed_parameters
{
ArrayList pars_list = (ArrayList) $1;
Parameter [] pars = new Parameter [pars_list.Count];
pars_list.CopyTo (pars);
$$ = new Parameters (pars, null, lexer.Location);
}
| fixed_parameters COMMA parameter_array
{
ArrayList pars_list = (ArrayList) $1;
Parameter [] pars = new Parameter [pars_list.Count];
pars_list.CopyTo (pars);
$$ = new Parameters (pars, (Parameter) $3, lexer.Location);
}
| parameter_array
{
$$ = new Parameters (null, (Parameter) $1, lexer.Location);
}
;
fixed_parameters
: fixed_parameter
{
ArrayList pars = new ArrayList (4);
pars.Add ($1);
$$ = pars;
}
| fixed_parameters COMMA fixed_parameter
{
ArrayList pars = (ArrayList) $1;
pars.Add ($3);
$$ = $1;
}
;
fixed_parameter
: opt_attributes
opt_parameter_modifier
type
IDENTIFIER
{
$$ = new Parameter ((Expression) $3, (string) $4, (Parameter.Modifier) $2, (Attributes) $1);
}
| opt_attributes
opt_parameter_modifier
type
error {
CheckIdentifierToken (yyToken);
$$ = null;
}
;
opt_parameter_modifier
: /* empty */ { $$ = Parameter.Modifier.NONE; }
| parameter_modifier
;
parameter_modifier
: REF { $$ = Parameter.Modifier.REF | Parameter.Modifier.ISBYREF; }
| OUT { $$ = Parameter.Modifier.OUT | Parameter.Modifier.ISBYREF; }
;
parameter_array
: opt_attributes PARAMS type IDENTIFIER
{
$$ = new Parameter ((Expression) $3, (string) $4, Parameter.Modifier.PARAMS, (Attributes) $1);
note ("type must be a single-dimension array type");
}
| opt_attributes PARAMS type error {
CheckIdentifierToken (yyToken);
$$ = null;
}
;
property_declaration
: opt_attributes
opt_modifiers
type namespace_or_type_name
OPEN_BRACE
{
implicit_value_parameter_type = (Expression) $3;
lexer.PropertyParsing = true;
$$ = lexer.Location;
iterator_container = SimpleIteratorContainer.GetSimple ();
}
accessor_declarations
{
lexer.PropertyParsing = false;
}
CLOSE_BRACE
{
Property prop;
Pair pair = (Pair) $7;
Accessor get_block = (Accessor) pair.First;
Accessor set_block = (Accessor) pair.Second;
TypeName type_name = (TypeName) $4;
if (type_name.TypeArguments != null)
syntax_error (lexer.Location, "a property can't have type arguments");
MemberName name = type_name.GetMemberName ();
Location loc = (Location) $6;
prop = new Property (current_container, (Expression) $3, (int) $2, false,
name, (Attributes) $1, get_block, set_block, loc);
if (SimpleIteratorContainer.Simple.Yields)
prop.SetYields ();
CheckDef (current_container.AddProperty (prop), prop.Name, loc);
implicit_value_parameter_type = null;
iterator_container = null;
}
;
accessor_declarations
: get_accessor_declaration opt_set_accessor_declaration
{
$$ = new Pair ($1, $2);
}
| set_accessor_declaration opt_get_accessor_declaration
{
$$ = new Pair ($2, $1);
}
;
opt_get_accessor_declaration
: /* empty */ { $$ = null; }
| get_accessor_declaration
;
opt_set_accessor_declaration
: /* empty */ { $$ = null; }
| set_accessor_declaration
;
get_accessor_declaration
: opt_attributes GET
{
// If this is not the case, then current_local_parameters has already
// been set in indexer_declaration
if (parsing_indexer == false)
current_local_parameters = null;
else
current_local_parameters = indexer_parameters;
lexer.PropertyParsing = false;
}
accessor_body
{
$$ = new Accessor ((Block) $4, (Attributes) $1);
current_local_parameters = null;
lexer.PropertyParsing = true;
}
;
set_accessor_declaration
: opt_attributes SET
{
Parameter [] args;
Parameter implicit_value_parameter = new Parameter (
implicit_value_parameter_type, "value",
Parameter.Modifier.NONE, null);
if (parsing_indexer == false) {
args = new Parameter [1];
args [0] = implicit_value_parameter;
current_local_parameters = new Parameters (args, null, lexer.Location);
} else {
Parameter [] fpars = indexer_parameters.FixedParameters;
if (fpars != null){
int count = fpars.Length;
args = new Parameter [count + 1];
fpars.CopyTo (args, 0);
args [count] = implicit_value_parameter;
} else
args = null;
current_local_parameters = new Parameters (
args, indexer_parameters.ArrayParameter, lexer.Location);
}
lexer.PropertyParsing = false;
}
accessor_body
{
$$ = new Accessor ((Block) $4, (Attributes) $1);
current_local_parameters = null;
lexer.PropertyParsing = true;
}
;
accessor_body
: block
| SEMICOLON { $$ = null; }
;
interface_declaration
: opt_attributes
opt_modifiers
INTERFACE member_name
{
Interface new_interface;
MemberName full_interface_name = MakeName ((MemberName) $4);
new_interface = new Interface (current_namespace, current_container, full_interface_name,
(int) $2, (Attributes) $1, lexer.Location);
if (current_interface != null) {
Location l = lexer.Location;
Report.Error (-2, l, "Internal compiler error: interface inside interface");
}
current_interface = new_interface;
current_container = new_interface;
RootContext.Tree.RecordDecl (
full_interface_name.GetName (true), new_interface);
lexer.ConstraintsParsing = true;
}
opt_class_base
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
}
interface_body opt_semicolon
{
Interface new_interface = (Interface) current_interface;
CheckDef (new_interface.SetParameterInfo ((ArrayList) $7), new_interface.Name, new_interface.Location);
if ($6 != null)
new_interface.Bases = (ArrayList) $6;
current_interface = null;
current_container = current_container.Parent;
CheckDef (current_container.AddInterface (new_interface),
new_interface.Name, new_interface.Location);
}
| opt_attributes opt_modifiers INTERFACE error {
CheckIdentifierToken (yyToken);
}
;
interface_body
: OPEN_BRACE
opt_interface_member_declarations
CLOSE_BRACE
;
opt_interface_member_declarations
: /* empty */
| interface_member_declarations
;
interface_member_declarations
: interface_member_declaration
| interface_member_declarations interface_member_declaration
;
interface_member_declaration
: interface_method_declaration
{
Method m = (Method) $1;
CheckDef (current_interface.AddMethod (m), m.Name, m.Location);
}
| interface_property_declaration
{
Property p = (Property) $1;
CheckDef (current_interface.AddProperty (p), p.Name, p.Location);
}
| interface_event_declaration
{
if ($1 != null){
Event e = (Event) $1;
CheckDef (current_interface.AddEvent (e), e.Name, lexer.Location);
}
}
| interface_indexer_declaration
{
Indexer i = (Indexer) $1;
current_interface.AddIndexer (i);
}
;
opt_new
: opt_modifiers
{
int val = (int) $1;
val = Modifiers.Check (Modifiers.NEW | Modifiers.UNSAFE, val, 0, lexer.Location);
$$ = val;
}
;
interface_method_declaration
: opt_attributes opt_new type IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
SEMICOLON
{
$$ = new Method (current_container, (Expression) $3, (int) $2, true,
new MemberName ((string) $4), (Parameters) $6,
(Attributes) $1, lexer.Location);
}
| opt_attributes opt_new VOID IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
SEMICOLON
{
$$ = new Method (current_container, TypeManager.system_void_expr, (int) $2,
true, new MemberName ((string) $4), (Parameters) $6,
(Attributes) $1, lexer.Location);
}
;
interface_property_declaration
: opt_attributes
opt_new
type IDENTIFIER
OPEN_BRACE
{ lexer.PropertyParsing = true; }
interface_accessors
{ lexer.PropertyParsing = false; }
CLOSE_BRACE
{
InterfaceAccessorInfo pinfo = (InterfaceAccessorInfo) $7;
$$ = new Property (current_container, (Expression) $3, (int) $2, true,
new MemberName ((string) $4), (Attributes) $1,
pinfo.Get, pinfo.Set, lexer.Location);
}
| opt_attributes
opt_new
type error {
CheckIdentifierToken (yyToken);
$$ = null;
}
;
interface_accessors
: opt_attributes GET SEMICOLON { $$ = new InterfaceAccessorInfo (true, false, (Attributes) $1, null); }
| opt_attributes SET SEMICOLON { $$ = new InterfaceAccessorInfo (false, true, null, (Attributes) $1); }
| opt_attributes GET SEMICOLON opt_attributes SET SEMICOLON
{ $$ = new InterfaceAccessorInfo (true, true, (Attributes) $1, (Attributes) $3); }
| opt_attributes SET SEMICOLON opt_attributes GET SEMICOLON
{ $$ = new InterfaceAccessorInfo (true, true, (Attributes) $3, (Attributes) $1); }
;
interface_event_declaration
: opt_attributes opt_new EVENT type IDENTIFIER SEMICOLON
{
$$ = new EventField (current_container, (Expression) $4, (int) $2, true,
new MemberName ((string) $5), null,
(Attributes) $1, lexer.Location);
}
| opt_attributes opt_new EVENT type error {
CheckIdentifierToken (yyToken);
$$ = null;
}
| opt_attributes opt_new EVENT type IDENTIFIER ASSIGN {
Report.Error (68, lexer.Location, "Event declarations on interfaces can not be initialized.");
$$ = null;
}
| opt_attributes opt_new EVENT type IDENTIFIER OPEN_BRACE event_accessor_declarations CLOSE_BRACE {
Report.Error (69, lexer.Location, "Event accessors not valid on interfaces");
$$ = null;
}
;
interface_indexer_declaration
: opt_attributes opt_new type THIS
OPEN_BRACKET formal_parameter_list CLOSE_BRACKET
OPEN_BRACE
{ lexer.PropertyParsing = true; }
interface_accessors
{ lexer.PropertyParsing = false; }
CLOSE_BRACE
{
InterfaceAccessorInfo info = (InterfaceAccessorInfo) $10;
$$ = new Indexer (current_container, (Expression) $3, (int) $2, true,
MemberName.Null, (Parameters) $6, (Attributes) $1,
info.Get, info.Set, lexer.Location);
}
;
operator_declaration
: opt_attributes opt_modifiers operator_declarator
{
iterator_container = SimpleIteratorContainer.GetSimple ();
}
operator_body
{
OperatorDeclaration decl = (OperatorDeclaration) $3;
Operator op = new Operator (decl.optype, decl.ret_type, (int) $2, decl.arg1type, decl.arg1name,
decl.arg2type, decl.arg2name, (Block) $5, (Attributes) $1, decl.location);
if (SimpleIteratorContainer.Simple.Yields)
op.SetYields ();
// Note again, checking is done in semantic analysis
current_container.AddOperator (op);
current_local_parameters = null;
iterator_container = null;
}
;
operator_body
: block
| SEMICOLON { $$ = null; }
;
operator_declarator
: type OPERATOR overloadable_operator
OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
Operator.OpType op = (Operator.OpType) $3;
CheckUnaryOperator (op);
if (op == Operator.OpType.Addition)
op = Operator.OpType.UnaryPlus;
if (op == Operator.OpType.Subtraction)
op = Operator.OpType.UnaryNegation;
Parameter [] pars = new Parameter [1];
pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
current_local_parameters = new Parameters (pars, null, lexer.Location);
$$ = new OperatorDeclaration (op, (Expression) $1, (Expression) $5, (string) $6,
null, null, lexer.Location);
}
| type OPERATOR overloadable_operator
OPEN_PARENS
type IDENTIFIER COMMA
type IDENTIFIER
CLOSE_PARENS
{
CheckBinaryOperator ((Operator.OpType) $3);
Parameter [] pars = new Parameter [2];
pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
pars [1] = new Parameter ((Expression) $8, (string) $9, Parameter.Modifier.NONE, null);
current_local_parameters = new Parameters (pars, null, lexer.Location);
$$ = new OperatorDeclaration ((Operator.OpType) $3, (Expression) $1,
(Expression) $5, (string) $6,
(Expression) $8, (string) $9, lexer.Location);
}
| conversion_operator_declarator
;
overloadable_operator
// Unary operators:
: BANG { $$ = Operator.OpType.LogicalNot; }
| TILDE { $$ = Operator.OpType.OnesComplement; }
| OP_INC { $$ = Operator.OpType.Increment; }
| OP_DEC { $$ = Operator.OpType.Decrement; }
| TRUE { $$ = Operator.OpType.True; }
| FALSE { $$ = Operator.OpType.False; }
// Unary and binary:
| PLUS { $$ = Operator.OpType.Addition; }
| MINUS { $$ = Operator.OpType.Subtraction; }
// Binary:
| STAR { $$ = Operator.OpType.Multiply; }
| DIV { $$ = Operator.OpType.Division; }
| PERCENT { $$ = Operator.OpType.Modulus; }
| BITWISE_AND { $$ = Operator.OpType.BitwiseAnd; }
| BITWISE_OR { $$ = Operator.OpType.BitwiseOr; }
| CARRET { $$ = Operator.OpType.ExclusiveOr; }
| OP_SHIFT_LEFT { $$ = Operator.OpType.LeftShift; }
| OP_SHIFT_RIGHT { $$ = Operator.OpType.RightShift; }
| OP_EQ { $$ = Operator.OpType.Equality; }
| OP_NE { $$ = Operator.OpType.Inequality; }
| OP_GT { $$ = Operator.OpType.GreaterThan; }
| OP_LT { $$ = Operator.OpType.LessThan; }
| OP_GE { $$ = Operator.OpType.GreaterThanOrEqual; }
| OP_LE { $$ = Operator.OpType.LessThanOrEqual; }
;
conversion_operator_declarator
: IMPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
Parameter [] pars = new Parameter [1];
pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
current_local_parameters = new Parameters (pars, null, lexer.Location);
$$ = new OperatorDeclaration (Operator.OpType.Implicit, (Expression) $3, (Expression) $5, (string) $6,
null, null, lexer.Location);
}
| EXPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
Parameter [] pars = new Parameter [1];
pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
current_local_parameters = new Parameters (pars, null, lexer.Location);
$$ = new OperatorDeclaration (Operator.OpType.Explicit, (Expression) $3, (Expression) $5, (string) $6,
null, null, lexer.Location);
}
| IMPLICIT error
{
syntax_error (lexer.Location, "'operator' expected");
}
| EXPLICIT error
{
syntax_error (lexer.Location, "'operator' expected");
}
;
constructor_declaration
: opt_attributes
opt_modifiers
constructor_declarator
constructor_body
{
Constructor c = (Constructor) $3;
c.Block = (Block) $4;
c.OptAttributes = (Attributes) $1;
c.ModFlags = (int) $2;
if (c.Name == current_container.Basename){
if ((c.ModFlags & Modifiers.STATIC) != 0){
if ((c.ModFlags & Modifiers.Accessibility) != 0){
Report.Error (
515, c.Location, String.Format (
"`{0}.{1}': static constructor can not have access modifiers",
c.Name, current_container.Name));
}
c.ModFlags = Modifiers.Check (Constructor.AllowedModifiers, (int) $2, Modifiers.PRIVATE, c.Location);
if (c.Initializer != null){
Report.Error (
514, c.Location,
"Static constructors can not have an explicit this or base " +
"constructor invocations");
}
if (!c.Parameters.Empty){
Report.Error (
132, c.Location, "Static constructors should not have parameters");
}
} else {
c.ModFlags = Modifiers.Check (Constructor.AllowedModifiers, (int) $2, Modifiers.PRIVATE, c.Location);
}
} else {
// We let another layer check the validity of the constructor.
Console.WriteLine ("{0} and {1}", c.Name, current_container.Basename);
}
CheckDef (current_container.AddConstructor (c), c.Name, c.Location);
current_local_parameters = null;
}
;
constructor_declarator
: IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
oob_stack.Push (lexer.Location);
current_local_parameters = (Parameters) $3;
}
opt_constructor_initializer
{
Location l = (Location) oob_stack.Pop ();
$$ = new Constructor (current_container, (string) $1, 0, (Parameters) $3,
(ConstructorInitializer) $6, l);
}
;
constructor_body
: block
| SEMICOLON { $$ = null; }
;
opt_constructor_initializer
: /* empty */ { $$ = null; }
| constructor_initializer
;
constructor_initializer
: COLON BASE OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new ConstructorBaseInitializer ((ArrayList) $4, current_local_parameters, lexer.Location);
}
| COLON THIS OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new ConstructorThisInitializer ((ArrayList) $4, current_local_parameters, lexer.Location);
}
| COLON error {
Report.Error (1018, lexer.Location, "Keyword this or base expected");
$$ = null;
}
;
opt_finalizer
: /* EMPTY */ { $$ = 0; }
| UNSAFE { $$ = Modifiers.UNSAFE; }
| EXTERN { $$ = Modifiers.EXTERN; }
;
destructor_declaration
: opt_attributes opt_finalizer TILDE IDENTIFIER OPEN_PARENS CLOSE_PARENS block
{
if ((string) $4 != current_container.Basename){
Report.Error (574, lexer.Location, "Name of destructor must match name of class");
} else if (!(current_container is Class)){
Report.Error (575, lexer.Location, "Destructors are only allowed in class types");
} else {
Location l = lexer.Location;
int m = (int) $2;
if (!RootContext.StdLib && current_container.Name == "System.Object")
m |= Modifiers.PROTECTED | Modifiers.VIRTUAL;
else
m |= Modifiers.PROTECTED | Modifiers.OVERRIDE;
if ((m & Modifiers.UNSAFE) != 0){
if (!RootContext.Unsafe){
Report.Error (227, l,
"Unsafe code requires the -unsafe command " +
"line option to be specified");
}
}
Method d = new Destructor (
current_container, TypeManager.system_void_expr, m, "Finalize",
new Parameters (null, null, l), (Attributes) $1, l);
d.Block = (Block) $7;
CheckDef (current_container.AddMethod (d), d.Name, d.Location);
}
}
| opt_attributes opt_modifiers EVENT type member_name OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS block {
string mn = (string) $5;
if (mn.IndexOf ('.') != -1)
Report.Error (71, lexer.Location, "Explicit implementation of events requires property syntax");
else
Report.Error (71, lexer.Location, "Event declaration should use property syntax");
}
;
event_declaration
: opt_attributes
opt_modifiers
EVENT type variable_declarators SEMICOLON
{
foreach (VariableDeclaration var in (ArrayList) $5) {
MemberName name = new MemberName (var.identifier);
Event e = new EventField (current_container, (Expression) $4, (int) $2,
false, name,
var.expression_or_array_initializer,
(Attributes) $1, lexer.Location);
CheckDef (current_container.AddEvent (e), e.Name, e.Location);
}
}
| opt_attributes
opt_modifiers
EVENT type namespace_or_type_name
OPEN_BRACE
{
implicit_value_parameter_type = (Expression) $4;
lexer.EventParsing = true;
oob_stack.Push (lexer.Location);
}
event_accessor_declarations
{
lexer.EventParsing = false;
}
CLOSE_BRACE
{
Location loc = (Location) oob_stack.Pop ();
if ($8 == null){
Report.Error (65, lexer.Location, "Event must have both add and remove accesors");
$$ = null;
} else {
Pair pair = (Pair) $8;
TypeName type_name = (TypeName) $5;
if (type_name.TypeArguments != null)
syntax_error (lexer.Location, "an event can't have type arguments");
MemberName name = type_name.GetMemberName ();
Event e = new EventProperty (current_container, (Expression) $4, (int) $2,
false, name, null, (Attributes) $1,
(Accessor) pair.First, (Accessor) pair.Second,
loc);
CheckDef (current_container.AddEvent (e), e.Name, loc);
implicit_value_parameter_type = null;
}
}
;
event_accessor_declarations
: add_accessor_declaration remove_accessor_declaration
{
$$ = new Pair ($1, $2);
}
| remove_accessor_declaration add_accessor_declaration
{
$$ = new Pair ($2, $1);
}
| add_accessor_declaration { $$ = null; }
| remove_accessor_declaration { $$ = null; }
;
add_accessor_declaration
: opt_attributes ADD
{
Parameter [] args = new Parameter [1];
Parameter implicit_value_parameter = new Parameter (
implicit_value_parameter_type, "value",
Parameter.Modifier.NONE, null);
args [0] = implicit_value_parameter;
current_local_parameters = new Parameters (args, null, lexer.Location);
lexer.EventParsing = false;
}
block
{
$$ = new Accessor ((Block) $4, (Attributes) $1);
lexer.EventParsing = true;
}
| opt_attributes ADD error {
Report.Error (73, lexer.Location, "Add or remove accessor must have a body");
$$ = null;
}
;
remove_accessor_declaration
: opt_attributes REMOVE
{
Parameter [] args = new Parameter [1];
Parameter implicit_value_parameter = new Parameter (
implicit_value_parameter_type, "value",
Parameter.Modifier.NONE, null);
args [0] = implicit_value_parameter;
current_local_parameters = new Parameters (args, null, lexer.Location);
lexer.EventParsing = false;
}
block
{
$$ = new Accessor ((Block) $4, (Attributes) $1);
lexer.EventParsing = true;
}
| opt_attributes REMOVE error {
Report.Error (73, lexer.Location, "Add or remove accessor must have a body");
$$ = null;
}
;
indexer_declaration
: opt_attributes opt_modifiers indexer_declarator
OPEN_BRACE
{
IndexerDeclaration decl = (IndexerDeclaration) $3;
implicit_value_parameter_type = decl.type;
lexer.PropertyParsing = true;
parsing_indexer = true;
indexer_parameters = decl.param_list;
oob_stack.Push (lexer.Location);
}
accessor_declarations
{
lexer.PropertyParsing = false;
parsing_indexer = false;
}
CLOSE_BRACE
{
// The signature is computed from the signature of the indexer. Look
// at section 3.6 on the spec
Location loc = (Location) oob_stack.Pop ();
Indexer indexer;
IndexerDeclaration decl = (IndexerDeclaration) $3;
Pair pair = (Pair) $6;
Accessor get_block = (Accessor) pair.First;
Accessor set_block = (Accessor) pair.Second;
MemberName name;
if (decl.interface_type != null)
name = new MemberName (decl.interface_type, "");
else
name = MemberName.Null;
indexer = new Indexer (current_container, decl.type, (int) $2, false,
name, decl.param_list, (Attributes) $1,
get_block, set_block, loc);
// Note that there is no equivalent of CheckDef for this case
// We shall handle this in semantic analysis
current_container.AddIndexer (indexer);
current_local_parameters = null;
implicit_value_parameter_type = null;
indexer_parameters = null;
}
;
indexer_declarator
: type THIS OPEN_BRACKET opt_formal_parameter_list CLOSE_BRACKET
{
Parameters pars = (Parameters) $4;
if (pars.FixedParameters == null && pars.ArrayParameter == null){
Report.Error (1551, lexer.Location, "Indexers must have at least one parameter");
}
$$ = new IndexerDeclaration ((Expression) $1, null, pars);
}
| type namespace_or_type_name DOT THIS OPEN_BRACKET opt_formal_parameter_list CLOSE_BRACKET
{
Parameters pars = (Parameters) $6;
if (pars.FixedParameters == null && pars.ArrayParameter == null){
Report.Error (1551, lexer.Location, "Indexers must have at least one parameter");
}
TypeName name = (TypeName) $2;
if (name.TypeArguments != null)
syntax_error (lexer.Location, "an indexer can't have type arguments");
$$ = new IndexerDeclaration ((Expression) $1, name, pars);
}
;
enum_declaration
: opt_attributes
opt_modifiers
ENUM IDENTIFIER
opt_enum_base
enum_body
opt_semicolon
{
Location enum_location = lexer.Location;
MemberName full_name = MakeName (new MemberName ((string) $4));
Enum e = new Enum (current_namespace, current_container, (Expression) $5, (int) $2,
full_name, (Attributes) $1, enum_location);
foreach (VariableDeclaration ev in (ArrayList) $6) {
Location loc = (Location) ev.Location;
CheckDef (e.AddEnumMember (ev.identifier,
(Expression) ev.expression_or_array_initializer,
loc, ev.OptAttributes),
ev.identifier, loc);
}
string name = full_name.GetName (false);
CheckDef (current_container.AddEnum (e), name, enum_location);
RootContext.Tree.RecordDecl (name, e);
}
;
opt_enum_base
: /* empty */ { $$ = TypeManager.system_int32_expr; }
| COLON type { $$ = $2; }
;
enum_body
: OPEN_BRACE opt_enum_member_declarations CLOSE_BRACE
{
$$ = $2;
}
;
opt_enum_member_declarations
: /* empty */ { $$ = new ArrayList (4); }
| enum_member_declarations opt_comma { $$ = $1; }
;
enum_member_declarations
: enum_member_declaration
{
ArrayList l = new ArrayList (4);
l.Add ($1);
$$ = l;
}
| enum_member_declarations COMMA enum_member_declaration
{
ArrayList l = (ArrayList) $1;
l.Add ($3);
$$ = l;
}
;
enum_member_declaration
: opt_attributes IDENTIFIER
{
$$ = new VariableDeclaration ((string) $2, null, lexer.Location, (Attributes) $1);
}
| opt_attributes IDENTIFIER
{
$$ = lexer.Location;
}
ASSIGN expression
{
$$ = new VariableDeclaration ((string) $2, $5, lexer.Location, (Attributes) $1);
}
;
delegate_declaration
: opt_attributes
opt_modifiers
DELEGATE type member_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
Location l = lexer.Location;
Delegate del = new Delegate (
current_namespace, current_container, (Expression) $4, (int) $2,
MakeName ((MemberName) $5), (Parameters) $7, (Attributes) $1, l);
CheckDef (current_container.AddDelegate (del), del.Name, l);
current_delegate = del;
lexer.ConstraintsParsing = true;
}
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
}
SEMICOLON
{
CheckDef (current_delegate.SetParameterInfo ((ArrayList) $9), current_delegate.Name, current_delegate.Location);
current_delegate = null;
}
| opt_attributes
opt_modifiers
DELEGATE VOID member_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
Location l = lexer.Location;
Delegate del = new Delegate (
current_namespace, current_container,
TypeManager.system_void_expr, (int) $2, MakeName ((MemberName) $5),
(Parameters) $7, (Attributes) $1, l);
CheckDef (current_container.AddDelegate (del), del.Name, l);
current_delegate = del;
lexer.ConstraintsParsing = true;
}
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
}
SEMICOLON
{
CheckDef (current_delegate.SetParameterInfo ((ArrayList) $9), current_delegate.Name, current_delegate.Location);
current_delegate = null;
}
;
type_name
: namespace_or_type_name {
$$ = ((TypeName) $1).GetTypeExpression (lexer.Location);
}
;
namespace_or_type_name
: IDENTIFIER opt_type_argument_list {
$$ = new TypeName ((string) $1, (TypeArguments) $2);
}
| namespace_or_type_name DOT IDENTIFIER opt_type_argument_list {
$$ = new TypeName ((TypeName) $1, (string) $3, (TypeArguments) $4);
}
;
member_name
: IDENTIFIER opt_type_parameter_list {
$$ = new MemberName (null, (string) $1, (ArrayList) $2);
}
;
opt_type_argument_list
: /* empty */ { $$ = null; }
| OP_GENERICS_LT type_arguments OP_GENERICS_GT
{
$$ = $2;
}
;
type_arguments
: type {
TypeArguments type_args = new TypeArguments (lexer.Location);
type_args.Add ((Expression) $1);
$$ = type_args;
}
| type_arguments COMMA type {
TypeArguments type_args = (TypeArguments) $1;
type_args.Add ((Expression) $3);
$$ = type_args;
}
;
/*
* Before you think of adding a return_type, notice that we have been
* using two rules in the places where it matters (one rule using type
* and another identical one that uses VOID as the return type). This
* gets rid of a shift/reduce couple
*/
type
: type_name { /* class_type */
}
| builtin_types
| array_type
| pointer_type
;
pointer_type
: type STAR
{
//
// Note that here only unmanaged types are allowed but we
// can't perform checks during this phase - we do it during
// semantic analysis.
//
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
}
| VOID STAR
{
$$ = new ComposedCast (TypeManager.system_void_expr, "*", lexer.Location);
}
;
non_expression_type
: builtin_types
| non_expression_type rank_specifier
{
$$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
}
| non_expression_type STAR
{
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
}
| expression rank_specifiers
{
$$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
}
| expression STAR
{
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
}
//
// We need this because the parser will happily go and reduce IDENTIFIER STAR
// through this different path
//
| multiplicative_expression STAR
{
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
}
;
type_list
: type
{
ArrayList types = new ArrayList (4);
types.Add ($1);
$$ = types;
}
| type_list COMMA type
{
ArrayList types = (ArrayList) $1;
types.Add ($3);
$$ = types;
}
;
/*
* replaces all the productions for isolating the various
* simple types, but we need this to reuse it easily in local_variable_type
*/
builtin_types
: OBJECT { $$ = TypeManager.system_object_expr; }
| STRING { $$ = TypeManager.system_string_expr; }
| BOOL { $$ = TypeManager.system_boolean_expr; }
| DECIMAL { $$ = TypeManager.system_decimal_expr; }
| FLOAT { $$ = TypeManager.system_single_expr; }
| DOUBLE { $$ = TypeManager.system_double_expr; }
| integral_type
;
integral_type
: SBYTE { $$ = TypeManager.system_sbyte_expr; }
| BYTE { $$ = TypeManager.system_byte_expr; }
| SHORT { $$ = TypeManager.system_int16_expr; }
| USHORT { $$ = TypeManager.system_uint16_expr; }
| INT { $$ = TypeManager.system_int32_expr; }
| UINT { $$ = TypeManager.system_uint32_expr; }
| LONG { $$ = TypeManager.system_int64_expr; }
| ULONG { $$ = TypeManager.system_uint64_expr; }
| CHAR { $$ = TypeManager.system_char_expr; }
| VOID { $$ = TypeManager.system_void_expr; }
;
interface_type
: type_name
;
array_type
: type rank_specifiers
{
$$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
}
;
//
// Expressions, section 7.5
//
primary_expression
: literal
{
// 7.5.1: Literals
}
| type_name
{
$$ = $1;
}
| parenthesized_expression
| default_value_expression
| member_access
| invocation_expression
| element_access
| this_access
| base_access
| post_increment_expression
| post_decrement_expression
| new_expression
| typeof_expression
| sizeof_expression
| checked_expression
| unchecked_expression
| pointer_member_access
| anonymous_method_expression
;
literal
: boolean_literal
| integer_literal
| real_literal
| LITERAL_CHARACTER { $$ = new CharLiteral ((char) lexer.Value); }
| LITERAL_STRING { $$ = new StringLiteral ((string) lexer.Value); }
| NULL { $$ = NullLiteral.Null; }
;
real_literal
: LITERAL_FLOAT { $$ = new FloatLiteral ((float) lexer.Value); }
| LITERAL_DOUBLE { $$ = new DoubleLiteral ((double) lexer.Value); }
| LITERAL_DECIMAL { $$ = new DecimalLiteral ((decimal) lexer.Value); }
;
integer_literal
: LITERAL_INTEGER {
object v = lexer.Value;
if (v is int){
int i = (int) v;
if (i == 0)
$$ = IntLiteral.Zero;
else if (i == 1)
$$ = IntLiteral.One;
else
$$ = new IntLiteral (i);
} else if (v is uint)
$$ = new UIntLiteral ((UInt32) v);
else if (v is long)
$$ = new LongLiteral ((Int64) v);
else if (v is ulong)
$$ = new ULongLiteral ((UInt64) v);
else
Console.WriteLine ("OOPS. Unexpected result from scanner");
}
;
boolean_literal
: TRUE { $$ = new BoolLiteral (true); }
| FALSE { $$ = new BoolLiteral (false); }
;
parenthesized_expression_0
: OPEN_PARENS expression CLOSE_PARENS
{
$$ = $2;
lexer.Deambiguate_CloseParens ();
// After this, the next token returned is one of
// CLOSE_PARENS_CAST, CLOSE_PARENS_NO_CAST, CLOSE_PARENS_OPEN_PARENS
// or CLOSE_PARENS_MINUS.
}
;
parenthesized_expression
: parenthesized_expression_0 CLOSE_PARENS_NO_CAST
{
$$ = $1;
}
| parenthesized_expression_0 CLOSE_PARENS_MINUS
{
// If a parenthesized expression is followed by a minus, we need to wrap
// the expression inside a ParenthesizedExpression for the CS0075 check
// in Binary.DoResolve().
$$ = new ParenthesizedExpression ((Expression) $1, lexer.Location);
}
;;
member_access
: primary_expression DOT IDENTIFIER
{
$$ = new MemberAccess ((Expression) $1, (string) $3, lexer.Location);
}
| predefined_type DOT IDENTIFIER
{
$$ = new MemberAccess ((Expression) $1, (string) $3, lexer.Location);
}
;
predefined_type
: builtin_types
;
invocation_expression
: primary_expression OPEN_PARENS opt_argument_list CLOSE_PARENS
{
if ($1 == null) {
Location l = lexer.Location;
Report.Error (1, l, "Parse error");
}
$$ = new Invocation ((Expression) $1, (ArrayList) $3, lexer.Location);
}
| parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS OPEN_PARENS CLOSE_PARENS
{
$$ = new Invocation ((Expression) $1, new ArrayList (), lexer.Location);
}
| parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS primary_expression
{
$$ = new InvocationOrCast ((Expression) $1, (Expression) $3, lexer.Location);
}
;
opt_argument_list
: /* empty */ { $$ = null; }
| argument_list
;
argument_list
: argument
{
ArrayList list = new ArrayList (4);
list.Add ($1);
$$ = list;
}
| argument_list COMMA argument
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
| argument_list error {
CheckToken (1026, yyToken, ", or ) expected");
}
;
argument
: expression
{
$$ = new Argument ((Expression) $1, Argument.AType.Expression);
}
| REF variable_reference
{
$$ = new Argument ((Expression) $2, Argument.AType.Ref);
}
| OUT variable_reference
{
$$ = new Argument ((Expression) $2, Argument.AType.Out);
}
;
variable_reference
: expression { note ("section 5.4"); $$ = $1; }
;
element_access
: primary_expression OPEN_BRACKET expression_list CLOSE_BRACKET
{
$$ = new ElementAccess ((Expression) $1, (ArrayList) $3, lexer.Location);
}
| primary_expression rank_specifiers
{
// So the super-trick is that primary_expression
// can only be either a SimpleName or a MemberAccess.
// The MemberAccess case arises when you have a fully qualified type-name like :
// Foo.Bar.Blah i;
// SimpleName is when you have
// Blah i;
Expression expr = (Expression) $1;
if (expr is ComposedCast){
$$ = new ComposedCast (expr, (string) $2, lexer.Location);
} else if (!(expr is SimpleName || expr is MemberAccess || expr is ConstructedType)){
Error_ExpectingTypeName (lexer.Location, expr);
$$ = TypeManager.system_object_expr;
} else {
//
// So we extract the string corresponding to the SimpleName
// or MemberAccess
//
$$ = new ComposedCast (expr, (string) $2, lexer.Location);
}
}
;
expression_list
: expression
{
ArrayList list = new ArrayList (4);
list.Add ($1);
$$ = list;
}
| expression_list COMMA expression
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
;
this_access
: THIS
{
$$ = new This (current_block, lexer.Location);
}
;
base_access
: BASE DOT IDENTIFIER
{
$$ = new BaseAccess ((string) $3, lexer.Location);
}
| BASE OPEN_BRACKET expression_list CLOSE_BRACKET
{
$$ = new BaseIndexerAccess ((ArrayList) $3, lexer.Location);
}
| BASE error {
Report.Error (175, "Use of keyword `base' is not valid in this context");
$$ = null;
}
;
post_increment_expression
: primary_expression OP_INC
{
$$ = new UnaryMutator (UnaryMutator.Mode.PostIncrement,
(Expression) $1, lexer.Location);
}
;
post_decrement_expression
: primary_expression OP_DEC
{
$$ = new UnaryMutator (UnaryMutator.Mode.PostDecrement,
(Expression) $1, lexer.Location);
}
;
new_expression
: object_or_delegate_creation_expression
| array_creation_expression
;
object_or_delegate_creation_expression
: NEW type OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new New ((Expression) $2, (ArrayList) $4, lexer.Location);
}
;
array_creation_expression
: NEW type OPEN_BRACKET expression_list CLOSE_BRACKET
opt_rank_specifier
opt_array_initializer
{
$$ = new ArrayCreation ((Expression) $2, (ArrayList) $4, (string) $6, (ArrayList) $7, lexer.Location);
}
| NEW type rank_specifiers array_initializer
{
$$ = new ArrayCreation ((Expression) $2, (string) $3, (ArrayList) $4, lexer.Location);
}
| NEW type error
{
Report.Error (1526, lexer.Location, "new expression requires () or [] after type");
}
;
opt_rank_specifier
: /* empty */
{
$$ = "";
}
| rank_specifiers
{
$$ = $1;
}
;
rank_specifiers
: rank_specifier opt_rank_specifier
{
$$ = (string) $2 + (string) $1;
}
;
rank_specifier
: OPEN_BRACKET opt_dim_separators CLOSE_BRACKET
{
$$ = "[" + (string) $2 + "]";
}
;
opt_dim_separators
: /* empty */
{
$$ = "";
}
| dim_separators
{
$$ = $1;
}
;
dim_separators
: COMMA
{
$$ = ",";
}
| dim_separators COMMA
{
$$ = (string) $1 + ",";
}
;
opt_array_initializer
: /* empty */
{
$$ = null;
}
| array_initializer
{
$$ = $1;
}
;
array_initializer
: OPEN_BRACE CLOSE_BRACE
{
ArrayList list = new ArrayList (4);
$$ = list;
}
| OPEN_BRACE variable_initializer_list opt_comma CLOSE_BRACE
{
$$ = (ArrayList) $2;
}
;
variable_initializer_list
: variable_initializer
{
ArrayList list = new ArrayList (4);
list.Add ($1);
$$ = list;
}
| variable_initializer_list COMMA variable_initializer
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
;
typeof_expression
: TYPEOF OPEN_PARENS VOID CLOSE_PARENS
{
$$ = new TypeOfVoid (lexer.Location);
}
| TYPEOF OPEN_PARENS type CLOSE_PARENS
{
$$ = new TypeOf ((Expression) $3, lexer.Location);
}
;
sizeof_expression
: SIZEOF OPEN_PARENS type CLOSE_PARENS {
$$ = new SizeOf ((Expression) $3, lexer.Location);
}
;
checked_expression
: CHECKED OPEN_PARENS expression CLOSE_PARENS
{
$$ = new CheckedExpr ((Expression) $3, lexer.Location);
}
;
unchecked_expression
: UNCHECKED OPEN_PARENS expression CLOSE_PARENS
{
$$ = new UnCheckedExpr ((Expression) $3, lexer.Location);
}
;
pointer_member_access
: primary_expression OP_PTR IDENTIFIER
{
Expression deref;
deref = new Unary (Unary.Operator.Indirection, (Expression) $1, lexer.Location);
$$ = new MemberAccess (deref, (string) $3, lexer.Location);
}
;
anonymous_method_expression
: DELEGATE opt_anonymous_method_signature {
oob_stack.Push (current_local_parameters);
current_local_parameters = (Parameters)$2;
create_toplevel_block = true;
} block {
if (true){
Report.Error (-213, lexer.Location, "Anonymous methods are not supported in this branch");
$$ = null;
} else {
create_toplevel_block = false;
Report.Error (-213, lexer.Location, "Anonymous methods are only supported in V2");
if (!RootContext.V2){
Report.Error (-213, lexer.Location, "Anonymous methods are only supported in V2");
$$ = null;
} else
$$ = new AnonymousMethod ((Parameters) $2, (Block) $4, lexer.Location);
current_local_parameters = (Parameters) oob_stack.Pop ();
}
}
;
opt_anonymous_method_signature
: /* empty */ { $$ = Parameters.EmptyReadOnlyParameters; }
| anonymous_method_signature
;
anonymous_method_signature
: OPEN_PARENS opt_anonymous_method_parameter_list CLOSE_PARENS
{
if ($2 == null)
$$ = Parameters.EmptyReadOnlyParameters;
else {
ArrayList par_list = (ArrayList) $2;
Parameter [] pars = new Parameter [par_list.Count];
par_list.CopyTo (pars);
$$ = new Parameters (pars, null, lexer.Location);
}
}
;
opt_anonymous_method_parameter_list
: /* empty */ { $$ = null; }
| anonymous_method_parameter_list { $$ = $1; }
;
anonymous_method_parameter_list
: anonymous_method_parameter
{
ArrayList a = new ArrayList (4);
a.Add ($1);
$$ = a;
}
| anonymous_method_parameter_list COMMA anonymous_method_parameter
{
ArrayList a = (ArrayList) $1;
a.Add ($3);
$$ = a;
}
;
anonymous_method_parameter
: opt_parameter_modifier type IDENTIFIER {
$$ = new Parameter ((Expression) $2, (string) $2, (Parameter.Modifier) $1, null);
}
;
default_value_expression
: DEFAULT_OPEN_PARENS type CLOSE_PARENS
{
$$ = new DefaultValueExpression ((Expression) $2, lexer.Location);
}
;
unary_expression
: primary_expression
| BANG prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.LogicalNot, (Expression) $2, lexer.Location);
}
| TILDE prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.OnesComplement, (Expression) $2, lexer.Location);
}
| cast_expression
;
cast_list
: parenthesized_expression_0 CLOSE_PARENS_CAST unary_expression
{
$$ = new Cast ((Expression) $1, (Expression) $3, lexer.Location);
}
| parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS cast_expression
{
$$ = new Cast ((Expression) $1, (Expression) $3, lexer.Location);
}
;
cast_expression
: cast_list
| OPEN_PARENS non_expression_type CLOSE_PARENS prefixed_unary_expression
{
$$ = new Cast ((Expression) $2, (Expression) $4, lexer.Location);
}
;
//
// The idea to split this out is from Rhys' grammar
// to solve the problem with casts.
//
prefixed_unary_expression
: unary_expression
| PLUS prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.UnaryPlus, (Expression) $2, lexer.Location);
}
| MINUS prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.UnaryNegation, (Expression) $2, lexer.Location);
}
| OP_INC prefixed_unary_expression
{
$$ = new UnaryMutator (UnaryMutator.Mode.PreIncrement,
(Expression) $2, lexer.Location);
}
| OP_DEC prefixed_unary_expression
{
$$ = new UnaryMutator (UnaryMutator.Mode.PreDecrement,
(Expression) $2, lexer.Location);
}
| STAR prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.Indirection, (Expression) $2, lexer.Location);
}
| BITWISE_AND prefixed_unary_expression
{
$$ = new Unary (Unary.Operator.AddressOf, (Expression) $2, lexer.Location);
}
;
pre_increment_expression
: OP_INC prefixed_unary_expression
{
$$ = new UnaryMutator (UnaryMutator.Mode.PreIncrement,
(Expression) $2, lexer.Location);
}
;
pre_decrement_expression
: OP_DEC prefixed_unary_expression
{
$$ = new UnaryMutator (UnaryMutator.Mode.PreDecrement,
(Expression) $2, lexer.Location);
}
;
multiplicative_expression
: prefixed_unary_expression
| multiplicative_expression STAR prefixed_unary_expression
{
$$ = new Binary (Binary.Operator.Multiply,
(Expression) $1, (Expression) $3, lexer.Location);
}
| multiplicative_expression DIV prefixed_unary_expression
{
$$ = new Binary (Binary.Operator.Division,
(Expression) $1, (Expression) $3, lexer.Location);
}
| multiplicative_expression PERCENT prefixed_unary_expression
{
$$ = new Binary (Binary.Operator.Modulus,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
additive_expression
: multiplicative_expression
| additive_expression PLUS multiplicative_expression
{
$$ = new Binary (Binary.Operator.Addition,
(Expression) $1, (Expression) $3, lexer.Location);
}
| additive_expression MINUS multiplicative_expression
{
$$ = new Binary (Binary.Operator.Subtraction,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
shift_expression
: additive_expression
| shift_expression OP_SHIFT_LEFT additive_expression
{
$$ = new Binary (Binary.Operator.LeftShift,
(Expression) $1, (Expression) $3, lexer.Location);
}
| shift_expression OP_SHIFT_RIGHT additive_expression
{
$$ = new Binary (Binary.Operator.RightShift,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
relational_expression
: shift_expression
| relational_expression OP_LT shift_expression
{
$$ = new Binary (Binary.Operator.LessThan,
(Expression) $1, (Expression) $3, lexer.Location);
}
| relational_expression OP_GT shift_expression
{
$$ = new Binary (Binary.Operator.GreaterThan,
(Expression) $1, (Expression) $3, lexer.Location);
}
| relational_expression OP_LE shift_expression
{
$$ = new Binary (Binary.Operator.LessThanOrEqual,
(Expression) $1, (Expression) $3, lexer.Location);
}
| relational_expression OP_GE shift_expression
{
$$ = new Binary (Binary.Operator.GreaterThanOrEqual,
(Expression) $1, (Expression) $3, lexer.Location);
}
| relational_expression IS type
{
$$ = new Is ((Expression) $1, (Expression) $3, lexer.Location);
}
| relational_expression AS type
{
$$ = new As ((Expression) $1, (Expression) $3, lexer.Location);
}
;
equality_expression
: relational_expression
| equality_expression OP_EQ relational_expression
{
$$ = new Binary (Binary.Operator.Equality,
(Expression) $1, (Expression) $3, lexer.Location);
}
| equality_expression OP_NE relational_expression
{
$$ = new Binary (Binary.Operator.Inequality,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
and_expression
: equality_expression
| and_expression BITWISE_AND equality_expression
{
$$ = new Binary (Binary.Operator.BitwiseAnd,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
exclusive_or_expression
: and_expression
| exclusive_or_expression CARRET and_expression
{
$$ = new Binary (Binary.Operator.ExclusiveOr,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
inclusive_or_expression
: exclusive_or_expression
| inclusive_or_expression BITWISE_OR exclusive_or_expression
{
$$ = new Binary (Binary.Operator.BitwiseOr,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
conditional_and_expression
: inclusive_or_expression
| conditional_and_expression OP_AND inclusive_or_expression
{
$$ = new Binary (Binary.Operator.LogicalAnd,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
conditional_or_expression
: conditional_and_expression
| conditional_or_expression OP_OR conditional_and_expression
{
$$ = new Binary (Binary.Operator.LogicalOr,
(Expression) $1, (Expression) $3, lexer.Location);
}
;
conditional_expression
: conditional_or_expression
| conditional_or_expression INTERR expression COLON expression
{
$$ = new Conditional ((Expression) $1, (Expression) $3, (Expression) $5, lexer.Location);
}
;
assignment_expression
: prefixed_unary_expression ASSIGN expression
{
$$ = new Assign ((Expression) $1, (Expression) $3, lexer.Location);
}
| prefixed_unary_expression OP_MULT_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.Multiply, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_DIV_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.Division, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_MOD_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.Modulus, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_ADD_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.Addition, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_SUB_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.Subtraction, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_SHIFT_LEFT_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.LeftShift, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_SHIFT_RIGHT_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.RightShift, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_AND_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.BitwiseAnd, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_OR_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.BitwiseOr, (Expression) $1, (Expression) $3, l);
}
| prefixed_unary_expression OP_XOR_ASSIGN expression
{
Location l = lexer.Location;
$$ = new CompoundAssign (
Binary.Operator.ExclusiveOr, (Expression) $1, (Expression) $3, l);
}
;
expression
: conditional_expression
| assignment_expression
;
constant_expression
: expression
;
boolean_expression
: expression
;
//
// 10 classes
//
class_declaration
: opt_attributes
opt_modifiers
CLASS member_name
{
Class new_class;
MemberName name = MakeName ((MemberName) $4);
new_class = new Class (current_namespace, current_container, name, (int) $2,
(Attributes) $1, lexer.Location);
current_container = new_class;
RootContext.Tree.RecordDecl (name.GetName (true), new_class);
lexer.ConstraintsParsing = true;
}
opt_class_base
opt_type_parameter_constraints_clauses
{
lexer.ConstraintsParsing = false;
}
class_body
opt_semicolon
{
Class new_class = (Class) current_container;
CheckDef (new_class.SetParameterInfo ((ArrayList) $7), new_class.Name, new_class.Location);
if ($6 != null) {
if (new_class.Name == "System.Object") {
Report.Error (537, new_class.Location, "The class System.Object cannot have a base class or implement an interface.");
}
new_class.Bases = (ArrayList) $6;
}
current_container = current_container.Parent;
CheckDef (current_container.AddClass (new_class), new_class.Name, new_class.Location);
$$ = new_class;
}
| opt_attributes
opt_modifiers
CLASS IDENTIFIER
{
lexer.ConstraintsParsing = true;
}
WHERE {
Report.Error (80, lexer.Location,
"Contraints are not allowed on non-generic declarations");
yyErrorFlag = 0;
$$ = null;
}
;
opt_modifiers
: /* empty */ { $$ = (int) 0; }
| modifiers
;
modifiers
: modifier
| modifiers modifier
{
int m1 = (int) $1;
int m2 = (int) $2;
if ((m1 & m2) != 0) {
Location l = lexer.Location;
Report.Error (1004, l, "Duplicate modifier: `" + Modifiers.Name (m2) + "'");
}
$$ = (int) (m1 | m2);
}
;
modifier
: NEW { $$ = Modifiers.NEW; }
| PUBLIC { $$ = Modifiers.PUBLIC; }
| PROTECTED { $$ = Modifiers.PROTECTED; }
| INTERNAL { $$ = Modifiers.INTERNAL; }
| PRIVATE { $$ = Modifiers.PRIVATE; }
| ABSTRACT { $$ = Modifiers.ABSTRACT; }
| SEALED { $$ = Modifiers.SEALED; }
| STATIC { $$ = Modifiers.STATIC; }
| READONLY { $$ = Modifiers.READONLY; }
| VIRTUAL { $$ = Modifiers.VIRTUAL; }
| OVERRIDE { $$ = Modifiers.OVERRIDE; }
| EXTERN { $$ = Modifiers.EXTERN; }
| VOLATILE { $$ = Modifiers.VOLATILE; }
| UNSAFE { $$ = Modifiers.UNSAFE; }
;
opt_class_base
: /* empty */ { $$ = null; }
| class_base { $$ = $1; }
;
class_base
: COLON type_list { $$ = $2; }
;
opt_type_parameter_list
: /* empty */ { $$ = null; }
| type_parameter_list { $$ = $1; }
;
type_parameter_list
: OP_GENERICS_LT type_parameters OP_GENERICS_GT { $$ = $2; }
;
type_parameters
: type_parameter {
//
// Do some profiling to find the optimal size, for now we
// assume most people will be generic on one type (saves space
//
ArrayList type_parameters = new ArrayList (1);
type_parameters.Add ($1);
$$ = type_parameters;
}
| type_parameters COMMA type_parameter {
ArrayList type_parameters = (ArrayList) $1;
type_parameters.Add ($3);
$$ = type_parameters;
}
;
type_parameter
: IDENTIFIER
;
opt_type_parameter_constraints_clauses
: /* empty */ { $$ = null; }
| type_parameter_constraints_clauses
{ $$ = $1; }
;
type_parameter_constraints_clauses
: type_parameter_constraints_clause {
ArrayList constraints = new ArrayList (1);
constraints.Add ($1);
$$ = constraints;
}
| type_parameter_constraints_clauses type_parameter_constraints_clause {
ArrayList constraints = (ArrayList) $1;
constraints.Add ($2);
$$ = constraints;
}
;
type_parameter_constraints_clause
: WHERE type_parameter COLON type_parameter_constraints {
$$ = new Constraints ((string) $2, (ArrayList) $4, lexer.Location);
}
;
type_parameter_constraints
: type_parameter_constraint {
ArrayList constraints = new ArrayList (1);
constraints.Add ($1);
$$ = constraints;
}
| type_parameter_constraints COMMA type_parameter_constraint {
ArrayList constraints = (ArrayList) $1;
constraints.Add ($3);
$$ = constraints;
}
;
type_parameter_constraint
: type
| NEW OPEN_PARENS CLOSE_PARENS {
$$ = SpecialConstraint.Constructor;
}
| CLASS {
$$ = SpecialConstraint.ReferenceType;
}
| STRUCT {
$$ = SpecialConstraint.ValueType;
}
;
//
// Statements (8.2)
//
//
// A block is "contained" on the following places:
// method_body
// property_declaration as part of the accessor body (get/set)
// operator_declaration
// constructor_declaration
// destructor_declaration
// event_declaration as part of add_accessor_declaration or remove_accessor_declaration
//
block
: OPEN_BRACE
{
if (current_block == null || create_toplevel_block){
current_block = new ToplevelBlock (current_local_parameters, lexer.Location);
} else {
current_block = new Block (current_block, current_local_parameters,
lexer.Location, Location.Null);
}
}
opt_statement_list CLOSE_BRACE
{
while (current_block.Implicit)
current_block = current_block.Parent;
$$ = current_block;
current_block.SetEndLocation (lexer.Location);
current_block = current_block.Parent;
}
;
opt_statement_list
: /* empty */
| statement_list
;
statement_list
: statement
| statement_list statement
;
statement
: declaration_statement
{
if ($1 != null && (Block) $1 != current_block){
current_block.AddStatement ((Statement) $1);
current_block = (Block) $1;
}
}
| valid_declaration_statement
{
current_block.AddStatement ((Statement) $1);
}
| labeled_statement
;
valid_declaration_statement
: block
| empty_statement
| expression_statement
| selection_statement
| iteration_statement
| jump_statement
| try_statement
| checked_statement
| unchecked_statement
| lock_statement
| using_statement
| unsafe_statement
| fixed_statement
;
embedded_statement
: valid_declaration_statement
| declaration_statement
{
Report.Error (1023, lexer.Location, "An embedded statement may not be a declaration.");
$$ = null;
}
| labeled_statement
{
Report.Error (1023, lexer.Location, "An embedded statement may not be a labeled statement.");
$$ = null;
}
;
empty_statement
: SEMICOLON
{
$$ = EmptyStatement.Value;
}
;
labeled_statement
: IDENTIFIER COLON
{
LabeledStatement labeled = new LabeledStatement ((string) $1, lexer.Location);
if (current_block.AddLabel ((string) $1, labeled, lexer.Location))
current_block.AddStatement (labeled);
}
statement
;
declaration_statement
: local_variable_declaration SEMICOLON
{
if ($1 != null){
DictionaryEntry de = (DictionaryEntry) $1;
$$ = declare_local_variables ((Expression) de.Key, (ArrayList) de.Value, lexer.Location);
}
}
| local_constant_declaration SEMICOLON
{
if ($1 != null){
DictionaryEntry de = (DictionaryEntry) $1;
$$ = declare_local_constants ((Expression) de.Key, (ArrayList) de.Value);
}
}
;
/*
* The following is from Rhys' grammar:
* > Types in local variable declarations must be recognized as
* > expressions to prevent reduce/reduce errors in the grammar.
* > The expressions are converted into types during semantic analysis.
*/
local_variable_type
: primary_expression opt_rank_specifier
{
// FIXME: Do something smart here regarding the composition of the type.
// Ok, the above "primary_expression" is there to get rid of
// both reduce/reduce and shift/reduces in the grammar, it should
// really just be "type_name". If you use type_name, a reduce/reduce
// creeps up. If you use namespace_or_type_name (which is all we need
// really) two shift/reduces appear.
//
// So the super-trick is that primary_expression
// can only be either a SimpleName or a MemberAccess.
// The MemberAccess case arises when you have a fully qualified type-name like :
// Foo.Bar.Blah i;
// SimpleName is when you have
// Blah i;
Expression expr = (Expression) $1;
if (!(expr is SimpleName || expr is MemberAccess || expr is ComposedCast || expr is ConstructedType)) {
Error_ExpectingTypeName (lexer.Location, expr);
$$ = null;
} else {
//
// So we extract the string corresponding to the SimpleName
// or MemberAccess
//
if ((string) $2 == "")
$$ = $1;
else
$$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
}
}
| builtin_types opt_rank_specifier
{
if ((string) $2 == "")
$$ = $1;
else
$$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
}
;
local_variable_pointer_type
: primary_expression STAR
{
Expression expr = (Expression) $1;
Location l = lexer.Location;
if (!(expr is SimpleName || expr is MemberAccess || expr is ComposedCast || expr is ConstructedType)) {
Error_ExpectingTypeName (l, expr);
$$ = null;
} else
$$ = new ComposedCast ((Expression) $1, "*", l);
}
| builtin_types STAR
{
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);;
}
| VOID STAR
{
$$ = new ComposedCast (TypeManager.system_void_expr, "*", lexer.Location);;
}
| local_variable_pointer_type STAR
{
$$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
}
;
local_variable_declaration
: local_variable_type variable_declarators
{
if ($1 != null)
$$ = new DictionaryEntry ($1, $2);
else
$$ = null;
}
| local_variable_pointer_type opt_rank_specifier variable_declarators
{
if ($1 != null){
Expression t;
if ((string) $2 == "")
t = (Expression) $1;
else
t = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
$$ = new DictionaryEntry (t, $3);
} else
$$ = null;
}
;
local_constant_declaration
: CONST local_variable_type constant_declarators
{
if ($2 != null)
$$ = new DictionaryEntry ($2, $3);
else
$$ = null;
}
;
expression_statement
: statement_expression SEMICOLON
{
$$ = $1;
}
;
//
// We have to do the wrapping here and not in the case above,
// because statement_expression is used for example in for_statement
//
statement_expression
: invocation_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| object_creation_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| assignment_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| post_increment_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| post_decrement_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| pre_increment_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| pre_decrement_expression { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
| error {
Report.Error (1002, lexer.Location, "Expecting `;'");
$$ = null;
}
;
object_creation_expression
: object_or_delegate_creation_expression
{ note ("complain if this is a delegate maybe?"); }
;
selection_statement
: if_statement
| switch_statement
;
if_statement
: if_statement_open if_statement_rest
{
$$ = $2;
}
;
if_statement_open
: IF OPEN_PARENS
{
oob_stack.Push (lexer.Location);
}
;
if_statement_rest
: boolean_expression CLOSE_PARENS
embedded_statement
{
Location l = (Location) oob_stack.Pop ();
$$ = new If ((Expression) $1, (Statement) $3, l);
if (RootContext.WarningLevel >= 3){
if ($3 == EmptyStatement.Value)
Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
}
}
| boolean_expression CLOSE_PARENS
embedded_statement ELSE embedded_statement
{
Location l = (Location) oob_stack.Pop ();
$$ = new If ((Expression) $1, (Statement) $3, (Statement) $5, l);
}
;
switch_statement
: SWITCH OPEN_PARENS
{
oob_stack.Push (lexer.Location);
switch_stack.Push (current_block);
}
expression CLOSE_PARENS
switch_block
{
$$ = new Switch ((Expression) $4, (ArrayList) $6, (Location) oob_stack.Pop ());
current_block = (Block) switch_stack.Pop ();
}
;
switch_block
: OPEN_BRACE
opt_switch_sections
CLOSE_BRACE
{
$$ = $2;
}
;
opt_switch_sections
: /* empty */
{
Report.Error (1522, lexer.Location, "Empty switch block");
}
| switch_sections
;
switch_sections
: switch_section
{
ArrayList sections = new ArrayList (4);
sections.Add ($1);
$$ = sections;
}
| switch_sections switch_section
{
ArrayList sections = (ArrayList) $1;
sections.Add ($2);
$$ = sections;
}
;
switch_section
: switch_labels
{
current_block = current_block.CreateSwitchBlock (lexer.Location);
}
statement_list
{
Block topmost = current_block;
while (topmost.Implicit)
topmost = topmost.Parent;
$$ = new SwitchSection ((ArrayList) $1, topmost);
}
;
switch_labels
: switch_label
{
ArrayList labels = new ArrayList (4);
labels.Add ($1);
$$ = labels;
}
| switch_labels switch_label
{
ArrayList labels = (ArrayList) ($1);
labels.Add ($2);
$$ = labels;
}
;
switch_label
: CASE constant_expression COLON { $$ = new SwitchLabel ((Expression) $2, lexer.Location); }
| DEFAULT COLON { $$ = new SwitchLabel (null, lexer.Location); }
| error {
Report.Error (
1523, lexer.Location,
"The keyword case or default must precede code in switch block");
}
;
iteration_statement
: while_statement
| do_statement
| for_statement
| foreach_statement
;
while_statement
: WHILE OPEN_PARENS
{
oob_stack.Push (lexer.Location);
}
boolean_expression CLOSE_PARENS embedded_statement
{
Location l = (Location) oob_stack.Pop ();
$$ = new While ((Expression) $4, (Statement) $6, l);
if (RootContext.WarningLevel >= 3){
if ($6 == EmptyStatement.Value)
Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
}
}
;
do_statement
: DO embedded_statement
WHILE OPEN_PARENS {
oob_stack.Push (lexer.Location);
}
boolean_expression CLOSE_PARENS SEMICOLON
{
Location l = (Location) oob_stack.Pop ();
$$ = new Do ((Statement) $2, (Expression) $6, l);
}
;
for_statement
: FOR OPEN_PARENS
opt_for_initializer SEMICOLON
{
Block assign_block = new Block (current_block);
current_block = assign_block;
if ($3 is DictionaryEntry){
DictionaryEntry de = (DictionaryEntry) $3;
Expression type = (Expression) de.Key;
ArrayList var_declarators = (ArrayList) de.Value;
foreach (VariableDeclaration decl in var_declarators){
LocalInfo vi;
vi = current_block.AddVariable (
type, decl.identifier, current_local_parameters, decl.Location);
if (vi == null)
continue;
Location l = lexer.Location;
Expression expr;
if (decl.expression_or_array_initializer is Expression){
expr = (Expression) decl.expression_or_array_initializer;
} else if (decl.expression_or_array_initializer == null) {
expr = null;
} else {
ArrayList init = (ArrayList) decl.expression_or_array_initializer;
expr = new ArrayCreation (type, "", init, decl.Location);
}
LocalVariableReference var;
var = new LocalVariableReference (assign_block, decl.identifier, l);
if (expr != null) {
Assign a = new Assign (var, expr, decl.Location);
assign_block.AddStatement (new StatementExpression (a, lexer.Location));
}
}
$3 = null;
}
oob_stack.Push (lexer.Location);
}
opt_for_condition SEMICOLON
opt_for_iterator CLOSE_PARENS
embedded_statement
{
Location l = (Location) oob_stack.Pop ();
For f = new For ((Statement) $3, (Expression) $6, (Statement) $8, (Statement) $10, l);
if (RootContext.WarningLevel >= 3){
if ($10 == EmptyStatement.Value)
Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
}
current_block.AddStatement (f);
while (current_block.Implicit)
current_block = current_block.Parent;
$$ = current_block;
current_block = current_block.Parent;
}
;
opt_for_initializer
: /* empty */ { $$ = EmptyStatement.Value; }
| for_initializer
;
for_initializer
: local_variable_declaration
| statement_expression_list
;
opt_for_condition
: /* empty */ { $$ = null; }
| boolean_expression
;
opt_for_iterator
: /* empty */ { $$ = EmptyStatement.Value; }
| for_iterator
;
for_iterator
: statement_expression_list
;
statement_expression_list
: statement_expression
{
// CHANGE: was `null'
Block b = new Block (current_block, Block.Flags.Implicit);
b.AddStatement ((Statement) $1);
$$ = b;
}
| statement_expression_list COMMA statement_expression
{
Block b = (Block) $1;
b.AddStatement ((Statement) $3);
$$ = $1;
}
;
foreach_statement
: FOREACH OPEN_PARENS type IDENTIFIER IN
{
oob_stack.Push (lexer.Location);
}
expression CLOSE_PARENS
{
oob_stack.Push (current_block);
Block foreach_block = new Block (current_block);
LocalVariableReference v = null;
Location l = lexer.Location;
LocalInfo vi;
vi = foreach_block.AddVariable ((Expression) $3, (string) $4, current_local_parameters, l);
if (vi != null) {
vi.ReadOnly = true;
// Get a writable reference to this read-only variable.
v = new LocalVariableReference (foreach_block, (string) $4, l, vi, false);
}
current_block = foreach_block;
oob_stack.Push (v);
oob_stack.Push (current_block);
}
embedded_statement
{
Block foreach_block = (Block) oob_stack.Pop ();
LocalVariableReference v = (LocalVariableReference) oob_stack.Pop ();
Block prev_block = (Block) oob_stack.Pop ();
Location l = (Location) oob_stack.Pop ();
current_block = prev_block;
if (v != null) {
Foreach f = new Foreach ((Expression) $3, v, (Expression) $7, (Statement) $10, l);
foreach_block.AddStatement (f);
}
$$ = foreach_block;
}
;
jump_statement
: break_statement
| continue_statement
| goto_statement
| return_statement
| throw_statement
| yield_statement
;
break_statement
: BREAK SEMICOLON
{
$$ = new Break (lexer.Location);
}
;
continue_statement
: CONTINUE SEMICOLON
{
$$ = new Continue (lexer.Location);
}
;
goto_statement
: GOTO IDENTIFIER SEMICOLON
{
$$ = new Goto (current_block, (string) $2, lexer.Location);
}
| GOTO CASE constant_expression SEMICOLON
{
$$ = new GotoCase ((Expression) $3, lexer.Location);
}
| GOTO DEFAULT SEMICOLON
{
$$ = new GotoDefault (lexer.Location);
}
;
return_statement
: RETURN opt_expression SEMICOLON
{
$$ = new Return ((Expression) $2, lexer.Location);
}
;
throw_statement
: THROW opt_expression SEMICOLON
{
$$ = new Throw ((Expression) $2, lexer.Location);
}
;
yield_statement
: IDENTIFIER RETURN expression SEMICOLON
{
string s = (string) $1;
if (s != "yield"){
Report.Error (1003, lexer.Location, "; expected");
$$ = null;
}
if (!RootContext.V2){
Report.Error (-222, lexer.Location, "yield statement only available in C# 2.0 mode");
$$ = null;
}
if (iterator_container == null){
Report.Error (204, lexer.Location, "yield statement can only be used within a method, operator or property");
$$ = null;
} else {
iterator_container.SetYields ();
$$ = new Yield ((Expression) $3, lexer.Location);
}
}
| IDENTIFIER BREAK SEMICOLON
{
string s = (string) $1;
if (s != "yield"){
Report.Error (1003, lexer.Location, "; expected");
$$ = null;
}
if (!RootContext.V2){
Report.Error (-222, lexer.Location, "yield statement only available in C# 2.0 mode");
$$ = null;
}
if (iterator_container == null){
Report.Error (204, lexer.Location, "yield statement can only be used within a method, operator or property");
$$ = null;
} else {
iterator_container.SetYields ();
$$ = new YieldBreak (lexer.Location);
}
}
;
opt_expression
: /* empty */
| expression
;
try_statement
: TRY block catch_clauses
{
Catch g = null;
ArrayList s = new ArrayList (4);
foreach (Catch cc in (ArrayList) $3) {
if (cc.IsGeneral)
g = cc;
else
s.Add (cc);
}
// Now s contains the list of specific catch clauses
// and g contains the general one.
$$ = new Try ((Block) $2, s, g, null, lexer.Location);
}
| TRY block opt_catch_clauses FINALLY block
{
Catch g = null;
ArrayList s = new ArrayList (4);
ArrayList catch_list = (ArrayList) $3;
if (catch_list != null){
foreach (Catch cc in catch_list) {
if (cc.IsGeneral)
g = cc;
else
s.Add (cc);
}
}
$$ = new Try ((Block) $2, s, g, (Block) $5, lexer.Location);
}
| TRY block error
{
Report.Error (1524, lexer.Location, "Expected catch or finally");
}
;
opt_catch_clauses
: /* empty */ { $$ = null; }
| catch_clauses
;
catch_clauses
: catch_clause
{
ArrayList l = new ArrayList (4);
l.Add ($1);
$$ = l;
}
| catch_clauses catch_clause
{
ArrayList l = (ArrayList) $1;
l.Add ($2);
$$ = l;
}
;
opt_identifier
: /* empty */ { $$ = null; }
| IDENTIFIER
;
catch_clause
: CATCH opt_catch_args
{
Expression type = null;
string id = null;
if ($2 != null) {
DictionaryEntry cc = (DictionaryEntry) $2;
type = (Expression) cc.Key;
id = (string) cc.Value;
if (id != null){
ArrayList one = new ArrayList (4);
Location loc = lexer.Location;
one.Add (new VariableDeclaration (id, null, loc));
$1 = current_block;
current_block = new Block (current_block);
Block b = declare_local_variables (type, one, loc);
current_block = b;
}
}
} block {
Expression type = null;
string id = null;
if ($2 != null){
DictionaryEntry cc = (DictionaryEntry) $2;
type = (Expression) cc.Key;
id = (string) cc.Value;
if ($1 != null){
//
// FIXME: I can change this for an assignment.
//
while (current_block != (Block) $1)
current_block = current_block.Parent;
}
}
$$ = new Catch (type, id , (Block) $4, lexer.Location);
}
;
opt_catch_args
: /* empty */ { $$ = null; }
| catch_args
;
catch_args
: OPEN_PARENS type opt_identifier CLOSE_PARENS
{
$$ = new DictionaryEntry ($2, $3);
}
;
checked_statement
: CHECKED block
{
$$ = new Checked ((Block) $2);
}
;
unchecked_statement
: UNCHECKED block
{
$$ = new Unchecked ((Block) $2);
}
;
unsafe_statement
: UNSAFE
{
if (!RootContext.Unsafe){
Report.Error (227, lexer.Location,
"Unsafe code can only be used if --unsafe is used");
}
} block {
$$ = new Unsafe ((Block) $3);
}
;
fixed_statement
: FIXED OPEN_PARENS
type fixed_pointer_declarators
CLOSE_PARENS
{
Block assign_block = new Block (current_block, Block.Flags.Implicit);
ArrayList list = (ArrayList) $4;
Expression type = (Expression) $3;
Location l = lexer.Location;
int top = list.Count;
for (int i = 0; i < top; i++){
Pair p = (Pair) list [i];
LocalInfo v;
v = current_block.AddVariable (type, (string) p.First,current_local_parameters, l);
if (v == null)
continue;
v.ReadOnly = true;
p.First = v;
list [i] = p;
}
current_block.AddStatement (assign_block);
current_block = assign_block;
oob_stack.Push (assign_block);
oob_stack.Push (l);
}
embedded_statement
{
Location l = (Location) oob_stack.Pop ();
oob_stack.Pop ();
$$ = new Fixed ((Expression) $3, (ArrayList) $4, (Statement) $7, l);
}
;
fixed_pointer_declarators
: fixed_pointer_declarator {
ArrayList declarators = new ArrayList (4);
declarators.Add ($1);
$$ = declarators;
}
| fixed_pointer_declarators COMMA fixed_pointer_declarator
{
ArrayList declarators = (ArrayList) $1;
declarators.Add ($3);
$$ = declarators;
}
;
fixed_pointer_declarator
: IDENTIFIER ASSIGN expression
{
$$ = new Pair ($1, $3);
}
;
lock_statement
: LOCK OPEN_PARENS expression CLOSE_PARENS
{
//
}
embedded_statement
{
$$ = new Lock ((Expression) $3, (Statement) $6, lexer.Location);
}
;
using_statement
: USING OPEN_PARENS resource_acquisition CLOSE_PARENS
{
Block assign_block = new Block (current_block);
current_block = assign_block;
oob_stack.Push (lexer.Location);
if ($3 is DictionaryEntry){
DictionaryEntry de = (DictionaryEntry) $3;
Location l = lexer.Location;
Expression type = (Expression) de.Key;
ArrayList var_declarators = (ArrayList) de.Value;
ArrayList vars = new ArrayList (4);
foreach (VariableDeclaration decl in var_declarators){
LocalInfo vi = current_block.AddVariable (
type, decl.identifier,
current_local_parameters, decl.Location);
if (vi == null)
continue;
vi.ReadOnly = true;
Expression expr;
if (decl.expression_or_array_initializer is Expression){
expr = (Expression) decl.expression_or_array_initializer;
} else {
ArrayList init = (ArrayList) decl.expression_or_array_initializer;
expr = new ArrayCreation (type, "", init, decl.Location);
}
LocalVariableReference var;
// Get a writable reference to this read-only variable.
var = new LocalVariableReference (assign_block, decl.identifier, l, vi, false);
// This is so that it is not a warning on using variables
vi.Used = true;
vars.Add (new DictionaryEntry (var, expr));
// Assign a = new Assign (var, expr, decl.Location);
// assign_block.AddStatement (new StatementExpression (a, lexer.Location));
}
$3 = new DictionaryEntry (type, vars);
}
}
embedded_statement
{
Using u = new Using ($3, (Statement) $6, (Location) oob_stack.Pop ());
current_block.AddStatement (u);
while (current_block.Implicit)
current_block = current_block.Parent;
$$ = current_block;
current_block = current_block.Parent;
}
;
resource_acquisition
: local_variable_declaration
| expression
;
%%
//
// A class used to pass around variable declarations and constants
//
public class VariableDeclaration {
public string identifier;
public object expression_or_array_initializer;
public Location Location;
public Attributes OptAttributes;
public VariableDeclaration (string id, object eoai, Location l, Attributes opt_attrs)
{
this.identifier = id;
this.expression_or_array_initializer = eoai;
this.Location = l;
this.OptAttributes = opt_attrs;
}
public VariableDeclaration (string id, object eoai, Location l) : this (id, eoai, l, null)
{
}
}
///
/// Used to pass around interface property information
///
public class InterfaceAccessorInfo {
public readonly Accessor Get, Set;
public InterfaceAccessorInfo (bool has_get, bool has_set,
Attributes get_attrs, Attributes set_attrs)
{
if (has_get)
Get = new Accessor (null, get_attrs);
if (has_set)
Set = new Accessor (null, set_attrs);
}
}
//
// A class used to hold info about an indexer declarator
//
public class IndexerDeclaration {
public Expression type;
public TypeName interface_type;
public Parameters param_list;
public IndexerDeclaration (Expression type, TypeName interface_type,
Parameters param_list)
{
this.type = type;
this.interface_type = interface_type;
this.param_list = param_list;
}
}
//
// We use this when we do not have an object in advance that is an IIteratorContainer
//
public class SimpleIteratorContainer : IIteratorContainer {
public bool Yields;
public static SimpleIteratorContainer Simple = new SimpleIteratorContainer ();
//
// Reset and return
//
public static SimpleIteratorContainer GetSimple () {
Simple.Yields = false;
return Simple;
}
public void SetYields () { Yields = true; }
}
//
// A class used to hold info about an operator declarator
//
public class OperatorDeclaration {
public Operator.OpType optype;
public Expression ret_type, arg1type, arg2type;
public string arg1name, arg2name;
public Location location;
public OperatorDeclaration (Operator.OpType op, Expression ret_type,
Expression arg1type, string arg1name,
Expression arg2type, string arg2name, Location location)
{
optype = op;
this.ret_type = ret_type;
this.arg1type = arg1type;
this.arg1name = arg1name;
this.arg2type = arg2type;
this.arg2name = arg2name;
this.location = location;
}
}
void Error_ExpectingTypeName (Location l, Expression expr)
{
if (expr is Invocation){
Report.Error (1002, l, "; expected");
} else {
Report.Error (-1, l, "Invalid Type definition");
}
}
//
// Given the @class_name name, it creates a fully qualified name
// based on the containing declaration space
//
MemberName
MakeName (MemberName class_name)
{
string ns = current_namespace.FullName;
if (current_container.Name == ""){
if (ns != "")
return new MemberName (new TypeName (ns), class_name);
else
return class_name;
} else {
TypeName type = current_container.MemberName.MakeTypeName (lexer.Location);
return new MemberName (type, class_name);
}
}
//
// Used to report back to the user the result of a declaration
// in the current declaration space
//
void
CheckDef (DeclSpace.AdditionResult result, string name, Location l)
{
if (result == DeclSpace.AdditionResult.Success)
return;
switch (result){
case DeclSpace.AdditionResult.NameExists:
Report.Error (102, l, "The container `" + current_container.Name +
"' already contains a definition for `"+
name + "'");
break;
//
// This is handled only for static Constructors, because
// in reality we handle these by the semantic analysis later
//
case DeclSpace.AdditionResult.MethodExists:
Report.Error (
111, l, "Class `"+current_container.Name+
"' already defines a member called '" +
name + "' with the same parameter types (more than one default constructor)");
break;
case DeclSpace.AdditionResult.EnclosingClash:
Report.Error (542, l, "Member names cannot be the same as their enclosing type");
break;
case DeclSpace.AdditionResult.NotAConstructor:
Report.Error (1520, l, "Class, struct, or interface method must have a return type");
break;
case DeclSpace.AdditionResult.Error:
// Error has already been reported.
break;
}
}
void
CheckDef (bool result, string name, Location l)
{
if (result)
return;
CheckDef (DeclSpace.AdditionResult.NameExists, name, l);
}
Block declare_local_variables (Expression type, ArrayList variable_declarators, Location loc)
{
Block implicit_block;
ArrayList inits = null;
//
// We use the `Used' property to check whether statements
// have been added to the current block. If so, we need
// to create another block to contain the new declaration
// otherwise, as an optimization, we use the same block to
// add the declaration.
//
// FIXME: A further optimization is to check if the statements
// that were added were added as part of the initialization
// below. In which case, no other statements have been executed
// and we might be able to reduce the number of blocks for
// situations like this:
//
// int j = 1; int k = j + 1;
//
if (current_block.Used)
implicit_block = new Block (current_block, Block.Flags.Implicit, loc, Location.Null);
else
implicit_block = current_block;
foreach (VariableDeclaration decl in variable_declarators){
if (implicit_block.AddVariable (type, decl.identifier, current_local_parameters, decl.Location) != null) {
if (decl.expression_or_array_initializer != null){
if (inits == null)
inits = new ArrayList (4);
inits.Add (decl);
}
}
}
if (inits == null)
return implicit_block;
foreach (VariableDeclaration decl in inits){
Assign assign;
Expression expr;
if (decl.expression_or_array_initializer is Expression){
expr = (Expression) decl.expression_or_array_initializer;
} else {
ArrayList init = (ArrayList) decl.expression_or_array_initializer;
expr = new ArrayCreation (type, "", init, decl.Location);
}
LocalVariableReference var;
var = new LocalVariableReference (implicit_block, decl.identifier, loc);
assign = new Assign (var, expr, decl.Location);
implicit_block.AddStatement (new StatementExpression (assign, lexer.Location));
}
return implicit_block;
}
Block declare_local_constants (Expression type, ArrayList declarators)
{
Block implicit_block;
if (current_block.Used)
implicit_block = new Block (current_block, Block.Flags.Implicit);
else
implicit_block = current_block;
foreach (VariableDeclaration decl in declarators){
implicit_block.AddConstant (type, decl.identifier, (Expression) decl.expression_or_array_initializer,
current_local_parameters, decl.Location);
}
return implicit_block;
}
void CheckAttributeTarget (string a)
{
switch (a) {
case "assembly" : case "module" : case "field" : case "method" : case "param" : case "property" : case "type" :
return;
default :
Location l = lexer.Location;
Report.Error (658, l, "`" + a + "' is an invalid attribute target");
break;
}
}
void CheckUnaryOperator (Operator.OpType op)
{
switch (op) {
case Operator.OpType.LogicalNot:
case Operator.OpType.OnesComplement:
case Operator.OpType.Increment:
case Operator.OpType.Decrement:
case Operator.OpType.True:
case Operator.OpType.False:
case Operator.OpType.Addition:
case Operator.OpType.Subtraction:
break;
default :
Location l = lexer.Location;
Report.Error (1019, l, "Overloadable unary operator expected");
break;
}
}
void CheckBinaryOperator (Operator.OpType op)
{
switch (op) {
case Operator.OpType.Addition:
case Operator.OpType.Subtraction:
case Operator.OpType.Multiply:
case Operator.OpType.Division:
case Operator.OpType.Modulus:
case Operator.OpType.BitwiseAnd:
case Operator.OpType.BitwiseOr:
case Operator.OpType.ExclusiveOr:
case Operator.OpType.LeftShift:
case Operator.OpType.RightShift:
case Operator.OpType.Equality:
case Operator.OpType.Inequality:
case Operator.OpType.GreaterThan:
case Operator.OpType.LessThan:
case Operator.OpType.GreaterThanOrEqual:
case Operator.OpType.LessThanOrEqual:
break;
default :
Location l = lexer.Location;
Report.Error (1020, l, "Overloadable binary operator expected");
break;
}
}
void syntax_error (Location l, string msg)
{
Report.Error (1003, l, "Syntax error, " + msg);
}
void output (string s)
{
Console.WriteLine (s);
}
void note (string s)
{
// Used to put annotations
}
Tokenizer lexer;
public Tokenizer Lexer {
get {
return lexer;
}
}
public CSharpParser (SeekableStreamReader reader, SourceFile file, ArrayList defines)
{
current_namespace = new NamespaceEntry (null, file, null, Location.Null);
this.name = file.Name;
this.file = file;
current_container = RootContext.Tree.Types;
current_container.NamespaceEntry = current_namespace;
oob_stack = new Stack ();
switch_stack = new Stack ();
lexer = new Tokenizer (reader, file, defines);
}
public void parse ()
{
try {
if (yacc_verbose_flag)
yyparse (lexer, new yydebug.yyDebugSimple ());
else
yyparse (lexer);
Tokenizer tokenizer = lexer as Tokenizer;
tokenizer.cleanup ();
} catch (Exception e){
// Please do not remove this, it is used during debugging
// of the grammar
//
Console.WriteLine (e);
Report.Error (-25, lexer.Location, "Parsing error");
if (Driver.parser_verbose)
Console.WriteLine (e);
}
}
void CheckToken (int error, int yyToken, string msg)
{
if (yyToken >= Token.FIRST_KEYWORD && yyToken <= Token.LAST_KEYWORD){
Report.Error (error, lexer.Location, String.Format ("{0}: `{1}' is a keyword", msg, yyNames [yyToken].ToLower ()));
return;
}
Report.Error (error, lexer.Location, msg);
}
void CheckIdentifierToken (int yyToken)
{
CheckToken (1041, yyToken, "Identifier expected");
}
/* end end end */
}