%{
//
// cs-parser.jay: The Parser for the C# compiler
//
// Author: Miguel de Icaza (miguel@gnu.org)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
//
// TODO:
// (1) Get rid of the *Collections.cs, that is an idea I took from System.CodeDOM
// And come to think of it, it is not that great, it duplicates a lot of code
// for something which is not really needed. We still have piles of typecasts
// anwyays (due to the nature of the stack being a collection of Objects).
//
// (2) 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 { }"
//
// (3) Move Modifier checking from each object into the parser itself, that will
// get rid of the global "error" symbol that we use now to report errors.
// We still need to pass a pointer to the tree.ErrorHandler, but that is a
// separate problem
//
using System.Text;
using CIR;
using System;
namespace CIR
{
using System.Collections;
using Mono.Languages;
///
/// The C# Parser
///
public class CSharpParser : GenericParser {
Namespace current_namespace;
TypeContainer current_container;
//
// Current block is used to add statements as we find
// them.
//
Block current_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;
//
// 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" accesor
// method
//
Parameter [] implicit_value_parameters;
//
// Used to determine if we are parsing the get/set pair
// of an indexer or a property
//
bool parsing_indexer;
//
// Used to record all types defined
//
Tree tree;
RootContext rc;
%}
%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 ABSTRACT
%token AS
%token ADD
%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 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 WHILE
/* C# keywords which are not really keywords */
%token GET "get"
%token SET "set"
/* 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_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
/* 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
/*%start namespace_declaration */
%%
compilation_unit
: opt_using_directives opt_attributes opt_namespace_member_declarations EOF
{
// Check that using comes only before namespace elements
}
;
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
{
// FIXME : Need to implement actual action.
}
;
using_namespace_directive
: USING namespace_name SEMICOLON
{
current_namespace.Using ((string) $2);
}
;
// namespace_declarations
// : namespace_declaration
// | namespace_declarations namespace_declaration
namespace_declaration
: NAMESPACE qualified_identifier
{
current_namespace = new Namespace (current_namespace, (string) $2);
tree.RecordNamespace ((string) $2, current_namespace);
}
namespace_body opt_semicolon
{
current_namespace = current_namespace.Parent;
}
;
opt_semicolon
: /* empty */
| SEMICOLON
;
opt_comma
: /* empty */
| COMMA
;
qualified_identifier
: IDENTIFIER
| qualified_identifier DOT IDENTIFIER {
$$ = (($1).ToString ()) + "." + ($3.ToString ()); }
;
namespace_name
: namespace_or_type_name
;
namespace_body
: OPEN_BRACE
opt_using_directives
opt_namespace_member_declarations
CLOSE_BRACE
{
}
;
opt_using_directives
: /* empty */
| using_directives
;
opt_namespace_member_declarations
: /* empty */
| namespace_member_declarations
;
namespace_member_declarations
: namespace_member_declaration
| namespace_member_declarations namespace_member_declaration
;
namespace_member_declaration
: type_declaration
{
int mod_flags = 0;
string name = "";
if ($1 is Class){
Class c = (Class) $1;
mod_flags = c.ModFlags;
name = c.Name;
} else if ($1 is Struct){
Struct s = (Struct) $1;
mod_flags = s.ModFlags;
name = s.Name;
} else
break;
//
// We remove this error until we can
//if ((mod_flags & (Modifiers.PRIVATE|Modifiers.PROTECTED)) != 0){
// error (1527, "Namespace elements cant be explicitly " +
// "declared private or protected in `" + name + "'");
//}
}
| namespace_declaration
;
type_declaration
: class_declaration
| struct_declaration
| interface_declaration
| enum_declaration
| delegate_declaration
;
//
// Attributes 17.2
//
opt_attributes
: /* empty */ { $$ = null; }
| attribute_section opt_attributes
{
Attributes attrs;
if ($2 != null) {
attrs = (Attributes) $2;
attrs.AddAttribute ((Attribute) $1);
} else
attrs = new Attributes ((Attribute) $1);
$$ = attrs;
}
;
attribute_section
: OPEN_BRACKET attribute_target_specifier attribute_list CLOSE_BRACKET
{
string target = null;
if ($2 != null)
target = (string) $2;
$$ = new Attribute (target, (ArrayList) $3);
}
| OPEN_BRACKET attribute_list CLOSE_BRACKET
{
$$ = new Attribute (null, (ArrayList) $2);
}
;
attribute_target_specifier
: attribute_target COLON
{
$$ = $1;
}
;
attribute_target
: IDENTIFIER
{
CheckAttributeTarget ((string) $1);
$$ = $1;
}
| EVENT { $$ = "event"; }
| RETURN { $$ = "return"; }
;
attribute_list
: attribute
{
ArrayList attrs = new ArrayList ();
attrs.Add ($1);
$$ = attrs;
}
| attribute_list COMMA attribute
{
ArrayList attrs = (ArrayList) $1;
attrs.Add ($3);
$$ = attrs;
}
;
attribute
: attribute_name opt_attribute_arguments
{
$$ = new DictionaryEntry ($1, $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
: expression
{
ArrayList args = new ArrayList ();
args.Add ($1);
$$ = args;
}
| attribute_arguments COMMA expression
{
ArrayList args = (ArrayList) $1;
args.Add ($3);
$$ = args;
}
;
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 IDENTIFIER
{
Struct new_struct;
string full_struct_name = MakeName ((string) $4);
new_struct = new Struct (rc, current_container, full_struct_name, (int) $2, (Attributes) $1);
current_container = new_struct;
current_container.Namespace = current_namespace;
tree.RecordStruct (full_struct_name, new_struct);
}
opt_struct_interfaces
struct_body
opt_semicolon
{
Struct new_struct = (Struct) current_container;
current_container = current_container.Parent;
CheckDef (current_container.AddStruct (new_struct), new_struct.Name);
$$ = new_struct;
}
;
opt_struct_interfaces
: /* empty */
| struct_interfaces
;
struct_interfaces
: struct_interface
| struct_interfaces struct_interface
;
struct_interface
: COLON type_list
;
struct_body
: OPEN_BRACE opt_struct_member_declarations CLOSE_BRACE
;
opt_struct_member_declarations
: /* empty */
| struct_member_declarations
;
struct_member_declarations
: struct_member_declaration
| struct_member_declarations struct_member_declaration
;
struct_member_declaration
: constant_declaration
| field_declaration
| method_declaration
| property_declaration
| event_declaration
| indexer_declaration
| operator_declaration
| constructor_declaration
| type_declaration
;
constant_declaration
: opt_attributes
opt_modifiers
CONST
type
constant_declarators
SEMICOLON
{
foreach (DictionaryEntry constant in (ArrayList) $5){
Constant c = new Constant (
(string) $4, (string) constant.Key,
(Expression) constant.Value, (int) $2, (Attributes) $1);
CheckDef (current_container.AddConstant (c), c.Name);
}
}
;
constant_declarators
: constant_declarator
{
ArrayList constants = new ArrayList ();
constants.Add ($1);
$$ = constants;
}
| constant_declarators COMMA constant_declarator
{
ArrayList constants = (ArrayList) $1;
constants.Add ($3);
}
;
constant_declarator
: IDENTIFIER ASSIGN constant_expression
{
$$ = new DictionaryEntry ($1, $3);
}
;
field_declaration
: opt_attributes
opt_modifiers
type
variable_declarators
SEMICOLON
{
string type = (string) $3;
int mod = (int) $2;
foreach (VariableDeclaration var in (ArrayList) $4){
Field field = new Field (type, mod, var.identifier,
var.expression_or_array_initializer, (Attributes) $1);
CheckDef (current_container.AddField (field), field.Name);
}
}
;
variable_declarators
: variable_declarator
{
ArrayList decl = new ArrayList ();
decl.Add ($1);
$$ = 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);
}
| IDENTIFIER
{
$$ = new VariableDeclaration ((string) $1, null);
}
;
variable_initializer
: expression
{
$$ = $1;
}
| array_initializer
{
$$ = $1;
}
;
method_declaration
: method_header
method_body
{
Method method = (Method) $1;
method.Block = (Block) $2;
CheckDef (current_container.AddMethod (method), method.Name);
current_local_parameters = null;
}
;
method_header
: opt_attributes
opt_modifiers
type
member_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
Method method = new Method ((string) $3, (int) $2, (string) $4, (Parameters) $6, (Attributes) $1);
current_local_parameters = (Parameters) $6;
$$ = method;
}
| opt_attributes
opt_modifiers
VOID
member_name
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
{
Method method = new Method ("System.Void", (int) $2, (string) $4, (Parameters) $6, (Attributes) $1);
current_local_parameters = (Parameters) $6;
$$ = method;
}
;
method_body
: block
| SEMICOLON { $$ = null; }
;
opt_formal_parameter_list
: /* empty */ { $$ = new Parameters (null, null); }
| formal_parameter_list
;
formal_parameter_list
: fixed_parameters
{
ArrayList pars_list = (ArrayList) $1;
Parameter [] pars = new Parameter [pars_list.Count];
pars_list.CopyTo (pars);
$$ = new Parameters (pars, null);
}
| fixed_parameters COMMA parameter_array
{
ArrayList pars_list = (ArrayList) $1;
Parameter [] pars = new Parameter [pars_list.Count];
pars_list.CopyTo (pars);
$$ = new Parameters (pars, (Parameter) $3);
}
| parameter_array
{
$$ = new Parameters (null, (Parameter) $1);
}
;
fixed_parameters
: fixed_parameter
{
ArrayList pars = new ArrayList ();
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
{
$$ = new Parameter ((string) $3, (string) $4, (Parameter.Modifier) $2, (Attributes) $1);
}
;
opt_parameter_modifier
: /* empty */ { $$ = Parameter.Modifier.NONE; }
| parameter_modifier
;
parameter_modifier
: REF { $$ = Parameter.Modifier.REF; }
| OUT { $$ = Parameter.Modifier.OUT; }
;
parameter_array
: opt_attributes PARAMS type IDENTIFIER
{
$$ = new Parameter ((string) $3, (string) $4, Parameter.Modifier.PARAMS, (Attributes) $1);
note ("type must be a single-dimension array type");
}
;
member_name
: IDENTIFIER { $$ = $1.ToString (); }
| interface_type DOT IDENTIFIER { $$ = $1.ToString () + "." + $3.ToString (); }
;
property_declaration
: opt_attributes
opt_modifiers
type member_name
OPEN_BRACE
{
Parameter implicit_value_parameter;
implicit_value_parameter = new Parameter ((string) $3, "value", Parameter.Modifier.NONE, null);
lexer.properties = true;
implicit_value_parameters = new Parameter [1];
implicit_value_parameters [0] = implicit_value_parameter;
}
accessor_declarations
{
lexer.properties = false;
}
CLOSE_BRACE
{
Property prop;
DictionaryEntry pair = (DictionaryEntry) $7;
Block get_block = null;
Block set_block = null;
if (pair.Key != null)
get_block = (Block) pair.Key;
if (pair.Value != null)
set_block = (Block) pair.Value;
prop = new Property ((string) $3, (string) $4, (int) $2, get_block, set_block, (Attributes) $1);
CheckDef (current_container.AddProperty (prop), prop.Name);
implicit_value_parameters = null;
}
;
accessor_declarations
: get_accessor_declaration opt_set_accessor_declaration
{
$$ = new DictionaryEntry ($1, $2);
}
| set_accessor_declaration opt_get_accessor_declaration
{
$$ = new DictionaryEntry ($2, $1);
}
;
opt_get_accessor_declaration
: /* empty */ { $$ = null; }
| get_accessor_declaration
;
opt_set_accessor_declaration
: /* empty */ { $$ = null; }
| set_accessor_declaration
;
get_accessor_declaration
: opt_attributes GET
{
// If this is not the case, then current_local_parameters has already
// been set in indexer_declaration
if (parsing_indexer == false)
current_local_parameters = new Parameters (implicit_value_parameters, null);
}
accessor_body
{
$$ = $4;
current_local_parameters = null;
}
;
set_accessor_declaration
: opt_attributes SET
{
if (parsing_indexer == false)
current_local_parameters = new Parameters (implicit_value_parameters, null);
}
accessor_body
{
$$ = $4;
current_local_parameters = null;
}
;
accessor_body
: block
| SEMICOLON { $$ = new Block (null); }
;
interface_declaration
: opt_attributes
opt_modifiers
INTERFACE IDENTIFIER
{
Interface new_interface;
string full_interface_name = MakeName ((string) $4);
new_interface = new Interface (current_container, full_interface_name, (int) $2, (Attributes) $1);
if (current_interface != null) {
Location l = lexer.Location;
rc.Report.Error (-2, l, "Internal compiler error: interface inside interface");
}
current_interface = new_interface;
tree.RecordInterface (full_interface_name, new_interface);
}
opt_interface_base
interface_body
{
Interface new_interface = (Interface) current_interface;
if ($6 != null)
new_interface.Bases = (ArrayList) $6;
current_interface = null;
CheckDef (current_container.AddInterface (new_interface), new_interface.Name);
}
;
opt_interface_base
: /* empty */ { $$ = null; }
| interface_base
;
interface_base
: COLON interface_type_list { $$ = $2; }
;
interface_type_list
: interface_type
{
ArrayList interfaces = new ArrayList ();
interfaces.Add ($1);
$$ = interfaces;
}
| interface_type_list COMMA interface_type
{
ArrayList interfaces = (ArrayList) $1;
interfaces.Add ($3);
$$ = interfaces;
}
;
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
{
InterfaceMethod m = (InterfaceMethod) $1;
CheckDef (current_interface.AddMethod (m), m.Name);
}
| interface_property_declaration
{
InterfaceProperty p = (InterfaceProperty) $1;
CheckDef (current_interface.AddProperty (p), p.Name);
}
| interface_event_declaration
{
InterfaceEvent e = (InterfaceEvent) $1;
CheckDef (current_interface.AddEvent (e), e.Name);
}
| interface_indexer_declaration
{
InterfaceIndexer i = (InterfaceIndexer) $1;
CheckDef (current_interface.AddIndexer (i), "indexer");
}
;
opt_new
: /* empty */ { $$ = false; }
| NEW { $$ = true; }
;
interface_method_declaration
: opt_attributes opt_new type IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
SEMICOLON
{
$$ = new InterfaceMethod ((string) $3, (string) $4, (bool) $2, (Parameters) $6, (Attributes) $1);
}
| opt_attributes opt_new VOID IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
SEMICOLON
{
$$ = new InterfaceMethod ("System.Void", (string) $4, (bool) $2, (Parameters) $6, (Attributes) $1);
}
;
interface_property_declaration
: opt_attributes
opt_new
type IDENTIFIER
OPEN_BRACE
{ lexer.properties = true; }
interface_accesors
{ lexer.properties = false; }
CLOSE_BRACE
{
int gs = (int) $7;
$$ = new InterfaceProperty ((string) $3, (string) $4, (bool) $2,
(gs & 1) == 1, (gs & 2) == 2, (Attributes) $1);
}
;
interface_accesors
: opt_attributes GET SEMICOLON { $$ = 1; }
| opt_attributes SET SEMICOLON { $$ = 2; }
| opt_attributes GET SEMICOLON opt_attributes SET SEMICOLON
{ $$ = 3; }
| opt_attributes SET SEMICOLON opt_attributes GET SEMICOLON
{ $$ = 3; }
;
interface_event_declaration
: opt_attributes opt_new EVENT type IDENTIFIER SEMICOLON
{
$$ = new InterfaceEvent ((string) $4, (string) $5, (bool) $2, (Attributes) $1);
}
;
interface_indexer_declaration
: opt_attributes opt_new type THIS
OPEN_BRACKET formal_parameter_list CLOSE_BRACKET
OPEN_BRACE
{ lexer.properties = true; }
interface_accesors
{ lexer.properties = false; }
CLOSE_BRACE
{
int a_flags = (int) $10;
bool do_get = (a_flags & 1) == 1;
bool do_set = (a_flags & 2) == 2;
$$ = new InterfaceIndexer ((string) $3, (Parameters) $6, do_get, do_set, (bool) $2, (Attributes) $1);
}
;
operator_declaration
: opt_attributes opt_modifiers operator_declarator block
{
OperatorDeclaration decl = (OperatorDeclaration) $3;
Operator op = new Operator (decl.optype, decl.ret_type, (int) $2, decl.arg1type, decl.arg1name,
decl.arg2type, decl.arg2name, (Block) $4, (Attributes) $1);
// Note again, checking is done in semantic analysis
current_container.AddOperator (op);
}
;
operator_declarator
: type OPERATOR overloadable_operator
OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
CheckUnaryOperator ((Operator.OpType) $3);
$$ = new OperatorDeclaration ((Operator.OpType) $3, (string) $1, (string) $5, (string) $6, null, null);
}
| type OPERATOR overloadable_operator
OPEN_PARENS
type IDENTIFIER COMMA
type IDENTIFIER
CLOSE_PARENS
{
CheckBinaryOperator ((Operator.OpType) $3);
$$ = new OperatorDeclaration ((Operator.OpType) $3, (string) $1, (string) $5, (string) $6,
(string) $8, (string) $9);
}
| conversion_operator_declarator
;
overloadable_operator
// Unary operators:
: BANG { $$ = Operator.OpType.Negate; }
| TILDE { $$ = Operator.OpType.BitComplement; }
| OP_INC { $$ = Operator.OpType.Increment; }
| OP_DEC { $$ = Operator.OpType.Decrement; }
| TRUE { $$ = Operator.OpType.True; }
| FALSE { $$ = Operator.OpType.False; }
// Unary and binary:
| PLUS { $$ = Operator.OpType.Add; }
| MINUS { $$ = Operator.OpType.Subtract; }
// Binary:
| STAR { $$ = Operator.OpType.Multiply; }
| DIV { $$ = Operator.OpType.Divide; }
| PERCENT { $$ = Operator.OpType.Modulo; }
| BITWISE_AND { $$ = Operator.OpType.BitwiseAnd; }
| BITWISE_OR { $$ = Operator.OpType.BitwiseOr; }
| CARRET { $$ = Operator.OpType.ExclusiveOr; }
| OP_SHIFT_LEFT { $$ = Operator.OpType.ShiftLeft; }
| OP_SHIFT_RIGHT { $$ = Operator.OpType.ShiftRight; }
| OP_EQ { $$ = Operator.OpType.Equal; }
| OP_NE { $$ = Operator.OpType.NotEqual; }
| OP_GT { $$ = Operator.OpType.GreaterThan; }
| OP_LT { $$ = Operator.OpType.LessThan; }
| OP_GE { $$ = Operator.OpType.GreaterOrEqual; }
| OP_LE { $$ = Operator.OpType.LesserOrEqual; }
;
conversion_operator_declarator
: IMPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
$$ = new OperatorDeclaration (Operator.OpType.Implicit, (string) $3, (string) $5, (string) $6,
null, null);
}
| EXPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
{
$$ = new OperatorDeclaration (Operator.OpType.Explicit, (string) $3, (string) $5, (string) $6,
null, null);
}
;
constructor_declaration
: opt_attributes
opt_modifiers
constructor_declarator
block
{
Constructor c = (Constructor) $3;
c.Block = (Block) $4;
c.ModFlags = (int) $2;
if ((c.ModFlags & Modifiers.STATIC) != 0){
if ((c.ModFlags & Modifiers.Accessibility) != 0) {
Location l = lexer.Location;
rc.Report.Error (515, l, "Access modifiers are not allowed on static constructors");
}
if (c.Initializer != null){
Location l = lexer.Location;
rc.Report.Error (514, l, "Static constructors can not have an explicit this or base constructor invocations");
}
if (!c.Parameters.Empty){
Location l = lexer.Location;
rc.Report.Error (103, l, "Static constructors should not have parameters");
}
} else {
if (c.Initializer == null)
c.Initializer = new ConstructorBaseInitializer (null);
}
CheckDef (current_container.AddConstructor (c), c.Name);
current_local_parameters = null;
}
;
constructor_declarator
: IDENTIFIER
OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
opt_constructor_initializer
{
$$ = new Constructor ((string) $1, (Parameters) $3, (ConstructorInitializer) $5);
current_local_parameters = (Parameters) $3;
}
;
opt_constructor_initializer
: /* empty */ { $$ = null; }
| constructor_initializer
;
constructor_initializer
: COLON BASE OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new ConstructorBaseInitializer ((ArrayList) $4);
}
| COLON THIS OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new ConstructorThisInitializer ((ArrayList) $4);
}
;
destructor_declaration
: opt_attributes TILDE IDENTIFIER OPEN_PARENS CLOSE_PARENS block
{
Method d = new Method ("System.Void", 0, "Finalize", new Parameters (null, null), (Attributes) $1);
d.Block = (Block) $6;
CheckDef (current_container.AddMethod (d), d.Name);
}
;
event_declaration
: opt_attributes
opt_modifiers
EVENT type variable_declarators SEMICOLON
{
foreach (VariableDeclaration var in (ArrayList) $5) {
// FIXME : Is this right ?
Event e = new Event ((string) $4, var.identifier, var.expression_or_array_initializer,
(int) $2, null, null, (Attributes) $1);
CheckDef (current_container.AddEvent (e), e.Name);
}
}
| opt_attributes
opt_modifiers
EVENT type member_name
OPEN_BRACE event_accessor_declarations CLOSE_BRACE
{
DictionaryEntry pair = (DictionaryEntry) $7;
Block add_block = null;
Block rem_block = null;
if (pair.Key != null)
add_block = (Block) pair.Key;
if (pair.Value != null)
rem_block = (Block) pair.Value;
Event e = new Event ((string) $4, (string) $5, null, (int) $2, add_block, rem_block, (Attributes) $1);
CheckDef (current_container.AddEvent (e), e.Name);
}
;
event_accessor_declarations
: add_accessor_declaration remove_accessor_declaration
{
$$ = new DictionaryEntry ($1, $2);
}
| remove_accessor_declaration add_accessor_declaration
{
$$ = new DictionaryEntry ($2, $1);
}
;
add_accessor_declaration
: opt_attributes ADD block
{
$$ = $3;
}
;
remove_accessor_declaration
: opt_attributes REMOVE block
{
$$ = $3;
}
;
indexer_declaration
: opt_attributes opt_modifiers indexer_declarator
OPEN_BRACE
{
IndexerDeclaration decl = (IndexerDeclaration) $3;
lexer.properties = true;
parsing_indexer = true;
current_local_parameters = decl.param_list;
}
accessor_declarations
{
lexer.properties = false;
parsing_indexer = false;
}
CLOSE_BRACE
{
// The signature is computed from the signature of the indexer. Look
// at section 3.6 on the spec
Indexer indexer;
IndexerDeclaration decl = (IndexerDeclaration) $3;
DictionaryEntry pair = (DictionaryEntry) $6;
Block get_block = null;
Block set_block = null;
if (pair.Key != null)
get_block = (Block) pair.Key;
if (pair.Value != null)
set_block = (Block) pair.Value;
indexer = new Indexer (decl.type, decl.interface_type, (int) $2, decl.param_list,
get_block, set_block, (Attributes) $1);
// Note that there is no equivalent of CheckDef for this case
// We shall handle this in semantic analysis
current_container.AddIndexer (indexer);
current_local_parameters = null;
}
;
indexer_declarator
: type THIS OPEN_BRACKET formal_parameter_list CLOSE_BRACKET
{
$$ = new IndexerDeclaration ((string) $1, null, (Parameters) $4);
}
| type interface_type DOT THIS OPEN_BRACKET formal_parameter_list CLOSE_BRACKET
{
$$ = new IndexerDeclaration ((string) $1, (string) $2, (Parameters) $6);
}
;
enum_declaration
: opt_attributes
opt_modifiers
ENUM IDENTIFIER
opt_enum_base
enum_body
opt_semicolon
{
string name = (string) $4;
Enum e = new Enum ((string) $5, (int) $2, name, (Attributes) $1);
foreach (VariableDeclaration ev in (ArrayList) $6){
CheckDef (e.AddEnumMember (ev.identifier,
(Expression) ev.expression_or_array_initializer),
ev.identifier);
}
CheckDef (current_container.AddEnum (e), name);
}
;
opt_enum_base
: /* empty */ { $$ = "System.Int32"; }
| COLON integral_type { $$ = $2; }
;
enum_body
: OPEN_BRACE opt_enum_member_declarations CLOSE_BRACE
{
$$ = $2;
}
;
opt_enum_member_declarations
: /* empty */ { $$ = new ArrayList (); }
| enum_member_declarations opt_comma { $$ = $1; }
;
enum_member_declarations
: enum_member_declaration
{
ArrayList l = new ArrayList ();
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
{
$$ = new VariableDeclaration ((string) $2, null);
}
| opt_attributes IDENTIFIER ASSIGN expression
{
$$ = new VariableDeclaration ((string) $2, $4);
}
;
delegate_declaration
: opt_attributes
opt_modifiers
DELEGATE type
IDENTIFIER OPEN_PARENS
formal_parameter_list
CLOSE_PARENS
SEMICOLON
{
Delegate del = new Delegate ((string) $4, (int) $2, (string) $5, (Parameters) $7, (Attributes) $1);
CheckDef (current_container.AddDelegate (del), del.Name);
}
| opt_attributes
opt_modifiers
DELEGATE VOID
IDENTIFIER OPEN_PARENS
formal_parameter_list
CLOSE_PARENS
SEMICOLON
{
Delegate del = new Delegate (null, (int) $2, (string) $5, (Parameters) $7, (Attributes) $1);
CheckDef (current_container.AddDelegate (del), del.Name);
}
;
type_name
: namespace_or_type_name
;
namespace_or_type_name
: qualified_identifier
;
/*
* 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 */
/*
This does interfaces, delegates, struct_types, class_types,
parent classes, and more! 4.2
*/
$$ = $1;
}
| builtin_types
| array_type
;
type_list
: type
{
ArrayList types = new ArrayList ();
types.Add ($1);
$$ = types;
}
| type_list COMMA type
{
ArrayList types = (ArrayList) $1;
types.Add ($3);
$$ = types;
}
;
/*
* replaces all the productions for isolating the various
* simple types, but we need this to reuse it easily in local_variable_type
*/
builtin_types
: OBJECT { $$ = "System.Object"; }
| STRING { $$ = "System.String"; }
| BOOL { $$ = "System.Boolean"; }
| DECIMAL { $$ = "System.Decimal"; }
| FLOAT { $$ = "System.Single"; }
| DOUBLE { $$ = "System.Double"; }
| integral_type
;
integral_type
: SBYTE { $$ = "System.SByte"; }
| BYTE { $$ = "System.Byte"; }
| SHORT { $$ = "System.Int16"; }
| USHORT { $$ = "System.UInt16"; }
| INT { $$ = "System.Int32"; }
| UINT { $$ = "System.UInt32"; }
| LONG { $$ = "System.Int64"; }
| ULONG { $$ = "System.UInt64"; }
| CHAR { $$ = "System.Char"; }
;
interface_type
: type_name
;
array_type
: type rank_specifiers
{
$$ = (string) $1 + (string) $2;
}
;
//
// Expressions, section 7.5
//
primary_expression
: literal
{
// 7.5.1: Literals
}
| qualified_identifier
{
string name = (string) $1;
$$ = null;
$$ = QualifiedIdentifier (name);
}
| parenthesized_expression
| member_access
| invocation_expression
| element_access
| this_access
| base_access
| post_increment_expression
| post_decrement_expression
| new_expression
| typeof_expression
| sizeof_expression
| checked_expression
| unchecked_expression
;
literal
: boolean_literal
| integer_literal
| real_literal
| LITERAL_CHARACTER { $$ = new CharLiteral ((char) lexer.Value); }
| LITERAL_STRING { $$ = new StringLiteral ((string) lexer.Value); }
| NULL { $$ = new NullLiteral (); }
;
real_literal
: LITERAL_FLOAT { $$ = new FloatLiteral ((float) lexer.Value); }
| LITERAL_DOUBLE { $$ = new DoubleLiteral ((double) lexer.Value); }
| LITERAL_DECIMAL { $$ = new DecimalLiteral ((decimal) lexer.Value); }
;
integer_literal
: LITERAL_INTEGER { $$ = new IntLiteral ((Int32) lexer.Value); }
;
boolean_literal
: TRUE { $$ = new BoolLiteral (true); }
| FALSE { $$ = new BoolLiteral (false); }
;
parenthesized_expression
: OPEN_PARENS expression CLOSE_PARENS
{ $$ = $2; }
;
member_access
: primary_expression DOT IDENTIFIER
{
$$ = new MemberAccess ((Expression) $1, (string) $3);
}
| predefined_type DOT IDENTIFIER
{
$$ = new BuiltinTypeAccess ((string) $1, (string) $3);
}
;
predefined_type
: builtin_types
;
invocation_expression
: primary_expression OPEN_PARENS opt_argument_list CLOSE_PARENS
{
// FIXME:
// if $1 is MethodGroup
// $$ = new Call ($1, $3);
// else
// $$ = new DelegateCall ($1, $3);
if ($1 == null) {
Location l = lexer.Location;
rc.Report.Error (1, l, "THIS IS CRAZY");
}
$$ = new Invocation ((Expression) $1, (ArrayList) $3);
}
;
opt_argument_list
: /* empty */ { $$ = null; }
| argument_list
;
argument_list
: argument
{
ArrayList list = new ArrayList ();
list.Add ($1);
$$ = list;
}
| argument_list COMMA argument
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
;
argument
: expression
{
$$ = 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);
}
;
expression_list
: expression
{
ArrayList list = new ArrayList ();
list.Add ($1);
$$ = list;
}
| expression_list COMMA expression
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
;
this_access
: THIS
{
$$ = new This ();
}
;
base_access
: BASE DOT IDENTIFIER
{
$$ = new BaseAccess (BaseAccess.BaseAccessType.Member, (string) $3, null);
}
| BASE OPEN_BRACKET expression_list CLOSE_BRACKET
{
$$ = new BaseAccess (BaseAccess.BaseAccessType.Indexer, null, (ArrayList) $3);
}
;
post_increment_expression
: primary_expression OP_INC
{
$$ = new Unary (Unary.Operator.PostIncrement, (Expression) $1);
}
;
post_decrement_expression
: primary_expression OP_DEC
{
$$ = new Unary (Unary.Operator.PostDecrement, (Expression) $1);
}
;
new_expression
: object_or_delegate_creation_expression
| array_creation_expression
;
object_or_delegate_creation_expression
: NEW type OPEN_PARENS opt_argument_list CLOSE_PARENS
{
$$ = new New ((string) $2, (ArrayList) $4);
}
;
array_creation_expression
: NEW type OPEN_BRACKET expression_list CLOSE_BRACKET
opt_rank_specifier
opt_array_initializer
{
$$ = new New ((string) $2, (ArrayList) $4, (string) $6, (ArrayList) $7);
}
;
opt_rank_specifier
: /* empty */
{
$$ = "";
}
| rank_specifiers
{
$$ = $1;
}
;
rank_specifiers
: rank_specifier
{
$$ = $1;
}
| rank_specifier rank_specifiers
{
$$ = (string) $1 + (string) $2;
}
;
rank_specifier
: OPEN_BRACKET opt_dim_separators CLOSE_BRACKET
{
$$ = "[" + (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 ();
$$ = list;
}
| OPEN_BRACE variable_initializer_list opt_comma CLOSE_BRACE
{
$$ = (ArrayList) $2;
}
;
variable_initializer_list
: variable_initializer
{
ArrayList list = new ArrayList ();
list.Add ($1);
$$ = list;
}
| variable_initializer_list COMMA variable_initializer
{
ArrayList list = (ArrayList) $1;
list.Add ($3);
$$ = list;
}
;
typeof_expression
: TYPEOF OPEN_PARENS type CLOSE_PARENS
{
$$ = new TypeOf ((string) $3);
}
;
sizeof_expression
: SIZEOF OPEN_PARENS type CLOSE_PARENS {
$$ = new SizeOf ((string) $3);
note ("Verify type is unmanaged");
note ("if (5.8) builtin, yield constant expression");
}
;
checked_expression
: CHECKED OPEN_PARENS expression CLOSE_PARENS
{
$$ = new CheckedExpr ((Expression) $3);
}
;
unchecked_expression
: UNCHECKED OPEN_PARENS expression CLOSE_PARENS
{
$$ = new UnCheckedExpr ((Expression) $3);
}
;
unary_expression
: primary_expression
| PLUS unary_expression {
$$ = new Unary (Unary.Operator.Plus, (Expression) $2);
}
| MINUS unary_expression
{
$$ = new Unary (Unary.Operator.Minus, (Expression) $2);
}
| BANG unary_expression
{
$$ = new Unary (Unary.Operator.Negate, (Expression) $2);
}
| TILDE unary_expression
{
$$ = new Unary (Unary.Operator.BitComplement, (Expression) $2);
}
| STAR unary_expression
{
$$ = new Unary (Unary.Operator.Indirection, (Expression) $2);
}
| BITWISE_AND unary_expression
{
$$ = new Unary (Unary.Operator.AddressOf, (Expression) $2);
}
| OP_INC unary_expression
{
$$ = new Unary (Unary.Operator.PreIncrement, (Expression) $2);
}
| OP_DEC unary_expression
{
$$ = new Unary (Unary.Operator.PreDecrement, (Expression) $2);
}
| cast_expression
/*
we can not do cast expressions at this level,
as there is an ambiguity. Check "Cast Expressions" 7.6.8
for the recipe to handle this.
*/
;
pre_increment_expression
: OP_INC unary_expression
{
$$ = new Unary (Unary.Operator.PreIncrement, (Expression) $2);
}
;
pre_decrement_expression
: OP_DEC unary_expression
{
$$ = new Unary (Unary.Operator.PreDecrement, (Expression) $2);
}
;
cast_expression
/*
* FIXME: This is actually wrong, it should be `type' but that
* introduces a lot of {shift,reduce}/reduces
*
* This is really really wrong. We need to track down
* the source of problems with QIs because expressions like:
* foreach (string s in (string []) object) wont be parsed.
*/
: OPEN_PARENS qualified_identifier CLOSE_PARENS unary_expression
{
$$ = new Cast ((string) $2, (Expression) $4);
}
| OPEN_PARENS builtin_types CLOSE_PARENS unary_expression
{
$$ = new Cast ((string) $2, (Expression) $4);
}
;
multiplicative_expression
: unary_expression
| multiplicative_expression STAR unary_expression
{
$$ = new Binary (Binary.Operator.Multiply,
(Expression) $1, (Expression) $3);
}
| multiplicative_expression DIV unary_expression
{
$$ = new Binary (Binary.Operator.Divide,
(Expression) $1, (Expression) $3);
}
| multiplicative_expression PERCENT unary_expression
{
$$ = new Binary (Binary.Operator.Modulo,
(Expression) $1, (Expression) $3);
}
;
additive_expression
: multiplicative_expression
| additive_expression PLUS multiplicative_expression
{
$$ = new Binary (Binary.Operator.Add,
(Expression) $1, (Expression) $3);
}
| additive_expression MINUS multiplicative_expression
{
$$ = new Binary (Binary.Operator.Subtract,
(Expression) $1, (Expression) $3);
}
;
shift_expression
: additive_expression
| shift_expression OP_SHIFT_LEFT additive_expression
{
$$ = new Binary (Binary.Operator.ShiftLeft,
(Expression) $1, (Expression) $3);
}
| shift_expression OP_SHIFT_RIGHT additive_expression
{
$$ = new Binary (Binary.Operator.ShiftRight,
(Expression) $1, (Expression) $3);
}
;
relational_expression
: shift_expression
| relational_expression OP_LT shift_expression
{
$$ = new Binary (Binary.Operator.LessThan,
(Expression) $1, (Expression) $3);
}
| relational_expression OP_GT shift_expression
{
$$ = new Binary (Binary.Operator.GreaterThan,
(Expression) $1, (Expression) $3);
}
| relational_expression OP_LE shift_expression
{
$$ = new Binary (Binary.Operator.LessOrEqual,
(Expression) $1, (Expression) $3);
}
| relational_expression OP_GE shift_expression
{
$$ = new Binary (Binary.Operator.GreaterOrEqual,
(Expression) $1, (Expression) $3);
}
| relational_expression IS type
{
$$ = new Probe (Probe.Operator.Is,
(Expression) $1, (string) $3);
}
| relational_expression AS type
{
$$ = new Probe (Probe.Operator.As,
(Expression) $1, (string) $3);
}
;
equality_expression
: relational_expression
| equality_expression OP_EQ relational_expression
{
$$ = new Binary (Binary.Operator.Equal,
(Expression) $1, (Expression) $3);
}
| equality_expression OP_NE relational_expression
{
$$ = new Binary (Binary.Operator.NotEqual,
(Expression) $1, (Expression) $3);
}
;
and_expression
: equality_expression
| and_expression BITWISE_AND equality_expression
{
$$ = new Binary (Binary.Operator.BitwiseAnd,
(Expression) $1, (Expression) $3);
}
;
exclusive_or_expression
: and_expression
| exclusive_or_expression CARRET and_expression
{
$$ = new Binary (Binary.Operator.ExclusiveOr,
(Expression) $1, (Expression) $3);
}
;
inclusive_or_expression
: exclusive_or_expression
| inclusive_or_expression BITWISE_OR exclusive_or_expression
{
$$ = new Binary (Binary.Operator.BitwiseOr,
(Expression) $1, (Expression) $3);
}
;
conditional_and_expression
: inclusive_or_expression
| conditional_and_expression OP_AND inclusive_or_expression
{
$$ = new Binary (Binary.Operator.LogicalAnd,
(Expression) $1, (Expression) $3);
}
;
conditional_or_expression
: conditional_and_expression
| conditional_or_expression OP_OR conditional_and_expression
{
$$ = new Binary (Binary.Operator.LogicalOr,
(Expression) $1, (Expression) $3);
}
;
conditional_expression
: conditional_or_expression
| conditional_or_expression INTERR expression COLON expression
{
$$ = new Conditional ((Expression) $1, (Expression) $3, (Expression) $5);
}
;
assignment_expression
: unary_expression ASSIGN expression
{
$$ = new Assign ((Expression) $1, (Expression) $3);
}
| unary_expression OP_MULT_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.Multiply,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_DIV_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.Divide,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_MOD_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.Modulo,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_ADD_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.Add,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_SUB_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.Subtract,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_SHIFT_LEFT_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.ShiftLeft,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_SHIFT_RIGHT_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.ShiftRight,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_AND_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.BitwiseAnd,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_OR_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.BitwiseOr,
(Expression) $1,
(Expression) $3));
}
| unary_expression OP_XOR_ASSIGN expression
{
$$ = new Assign ((Expression) $1,
new Binary (Binary.Operator.ExclusiveOr,
(Expression) $1,
(Expression) $3));
}
;
expression
: conditional_expression
| assignment_expression
;
constant_expression
: expression
;
boolean_expression
: expression { CheckBoolean ((Expression) $1); $$ = $1; }
;
//
// 10 classes
//
class_declaration
: opt_attributes
opt_modifiers
CLASS IDENTIFIER
{
Class new_class;
string full_class_name = MakeName ((string) $4);
new_class = new Class (rc, current_container, full_class_name, (int) $2, (Attributes) $1);
current_container = new_class;
current_container.Namespace = current_namespace;
tree.RecordClass (full_class_name, new_class);
}
opt_class_base
class_body
opt_semicolon
{
Class new_class = (Class) current_container;
if ($6 != null)
new_class.Bases = (ArrayList) $6;
current_container = current_container.Parent;
CheckDef (current_container.AddClass (new_class), new_class.Name);
$$ = new_class;
}
;
opt_modifiers
: /* empty */ { $$ = (int) 0; }
| modifiers
;
modifiers
: modifier
| modifiers modifier
{
int m1 = (int) $1;
int m2 = (int) $2;
if ((m1 & m2) != 0) {
Location l = lexer.Location;
rc.Report.Error (1002, l, "Duplicate modifier: `" + Modifiers.Name (m2) + "'");
}
$$ = (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; }
;
opt_class_base
: /* empty */ { $$ = null; }
| class_base { $$ = $1; }
;
class_base
: COLON type_list { $$ = $2; }
;
//
// Statements (8.2)
//
//
// A block is "contained" on the following places:
// method_body
// property_declaration as part of the accessor body (get/set)
// operator_declaration
// constructor_declaration
// destructor_declaration
// event_declaration as part of add_accessor_declaration or remove_accessor_declaration
//
block
: OPEN_BRACE
{
current_block = new Block (current_block);
}
opt_statement_list CLOSE_BRACE
{
while (current_block.Implicit)
current_block = current_block.Parent;
$$ = current_block;
current_block = current_block.Parent;
}
;
opt_statement_list
: /* empty */
| statement_list
;
statement_list
: statement
| statement_list statement
;
statement
: declaration_statement
{
if ((Block) $1 != current_block){
current_block.AddStatement ((Statement) $1);
current_block = (Block) $1;
}
}
| embedded_statement
{
current_block.AddStatement ((Statement) $1);
}
| labeled_statement
{
current_block.AddStatement ((Statement) $1);
}
;
embedded_statement
: block
| empty_statement
| expression_statement
| selection_statement
| iteration_statement
| jump_statement
| try_statement
| checked_statement
| unchecked_statement
| lock_statement
| using_statement
;
empty_statement
: SEMICOLON
{
$$ = new EmptyStatement ();
}
;
labeled_statement
: IDENTIFIER COLON statement
{
string lab = (String) $1;
Block block;
block = new Block (current_block, lab);
block.AddStatement ((Statement) $3);
$$ = block;
if (!current_block.AddLabel (lab, block)){
Location l = lexer.Location;
rc.Report.Error (140, l, "The label '" + lab + "' is a duplicate");
$$ = $3;
}
}
;
declaration_statement
: local_variable_declaration SEMICOLON // done
| local_constant_declaration SEMICOLON // finishme
;
/*
* The following is from Rhys' grammar:
* > Types in local variable declarations must be recognized as
* > expressions to prevent reduce/reduce errors in the grammar.
* > The expressions are converted into types during semantic analysis.
*/
local_variable_type
: primary_expression type_suffixes
{
// FIXME: Do something smart here regarding the composition of the type.
// Ok, the above "primary_expression" is there to get rid of
// both reduce/reduce and shift/reduces in the grammar, it should
// really just be "type_name". If you use type_name, a reduce/reduce
// creeps up. If you use qualified_identifier (which is all we need
// really) two shift/reduces appear.
//
// So, instead we do a super trick: we just allow ($1) to be a
// SimpleName Expression.
//
if (((Expression) $1) is SimpleName)
$$ = ((SimpleName) $1).Name;
else {
Location l = lexer.Location;
rc.Report.Error (-1, l, "Invalid Type definition");
$$ = "System.Object";
}
}
| builtin_types type_suffixes
{
$$ = (string) $1 + (string) $2;
}
;
// FIXME : How can the type of a local variable be void ? I don't quite see ;-)
// | VOID
// {
// // FIXME: this is a string that represents the type
// // Figure out something to make this work.
// $$ = "void";
// }
// ;
type_suffixes
: /* empty */
{
$$ = "";
}
| type_suffix_list
;
type_suffix_list
: type_suffix
| type_suffix_list type_suffix
{
$$ = (string) $1 + (string) $2;
}
;
type_suffix
: OPEN_BRACKET opt_dim_separators CLOSE_BRACKET
{
$$ = "[" + (string) $2 + "]";
}
;
local_variable_declaration
: local_variable_type variable_declarators
{
$$ = declare_local_variables ((string) $1, (ArrayList) $2);
}
;
local_constant_declaration
: CONST type constant_declarator
// finishme
;
expression_statement
: statement_expression SEMICOLON
{
$$ = $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 { $$ = new StatementExpression ((Expression) $1); }
| object_creation_expression { $$ = new StatementExpression ((Expression) $1); }
| assignment_expression { $$ = new StatementExpression ((Expression) $1); }
| post_increment_expression { $$ = new StatementExpression ((Expression) $1); }
| post_decrement_expression { $$ = new StatementExpression ((Expression) $1); }
| pre_increment_expression { $$ = new StatementExpression ((Expression) $1); }
| pre_decrement_expression { $$ = new StatementExpression ((Expression) $1); }
;
object_creation_expression
: object_or_delegate_creation_expression
{ note ("complain if this is a delegate maybe?"); }
;
selection_statement
: if_statement
| switch_statement
;
if_statement
: IF OPEN_PARENS boolean_expression CLOSE_PARENS
embedded_statement
{
$$ = new If ((Expression) $3, (Statement) $5);
}
| IF OPEN_PARENS boolean_expression CLOSE_PARENS
embedded_statement ELSE embedded_statement
{
$$ = new If ((Expression) $3, (Statement) $5, (Statement) $7);
}
;
switch_statement
: SWITCH OPEN_PARENS expression CLOSE_PARENS
switch_block
{
$$ = new Switch ((Expression) $3, (ArrayList) $5);
}
;
switch_block
: OPEN_BRACE
opt_switch_sections
CLOSE_BRACE
{
$$ = $2;
}
;
opt_switch_sections
: /* empty */ { $$ = new ArrayList (); }
| switch_sections
;
switch_sections
: switch_section
{
ArrayList sections = new ArrayList ();
sections.Add ($1);
$$ = sections;
}
| switch_sections switch_section
{
ArrayList sections = (ArrayList) $1;
sections.Add ($2);
$$ = sections;
}
;
switch_section
: switch_labels
{
current_block = new Block (current_block);
}
statement_list
{
while (current_block.Implicit)
current_block = current_block.Parent;
$$ = new SwitchSection ((ArrayList) $1, current_block);
current_block = current_block.Parent;
}
;
switch_labels
: switch_label
{
ArrayList labels = new ArrayList ();
labels.Add ($1);
$$ = labels;
}
| switch_labels switch_label
{
ArrayList labels = (ArrayList) ($1);
labels.Add ($2);
$$ = labels;
}
;
switch_label
: CASE constant_expression COLON { $$ = new SwitchLabel ((Expression) $2); }
| DEFAULT COLON { $$ = new SwitchLabel (null); }
;
iteration_statement
: while_statement
| do_statement
| for_statement
| foreach_statement
;
while_statement
: WHILE OPEN_PARENS boolean_expression CLOSE_PARENS embedded_statement
{
$$ = new While ((Expression) $3, (Statement) $5);
}
;
do_statement
: DO embedded_statement
WHILE OPEN_PARENS boolean_expression CLOSE_PARENS SEMICOLON
{
$$ = new Do ((Statement) $2, (Expression) $5);
}
;
for_statement
: FOR OPEN_PARENS
opt_for_initializer SEMICOLON
opt_for_condition SEMICOLON
opt_for_iterator CLOSE_PARENS
embedded_statement
{
$$ = new For ((Statement) $3, (Expression) $5, (Statement) $7, (Statement) $9);
}
;
opt_for_initializer
: /* empty */ { $$ = new EmptyStatement (); }
| for_initializer
;
for_initializer
: local_variable_declaration
| statement_expression_list
;
opt_for_condition
: /* empty */ { $$ = new BoolLiteral (true); }
| boolean_expression
;
opt_for_iterator
: /* empty */ { $$ = new EmptyStatement (); }
| for_iterator
;
for_iterator
: statement_expression_list
;
statement_expression_list
: statement_expression
{
Block b = new Block (null, true);
b.AddStatement ((Statement) $1);
$$ = b;
}
| statement_expression_list COMMA statement_expression
{
Block b = (Block) $1;
b.AddStatement ((Statement) $3);
$$ = $1;
}
;
foreach_statement
: FOREACH OPEN_PARENS type IDENTIFIER IN expression CLOSE_PARENS
embedded_statement
{
string temp_id = current_block.MakeInternalID ();
Expression assign_e, ma;
Statement getcurrent;
Block foreach_block, child_block;
foreach_block = new Block (current_block, true);
foreach_block.AddVariable ("System.IEnumerator", temp_id);
foreach_block.AddVariable ((string) $3, (string) $4);
assign_e = new Assign (new LocalVariableReference (foreach_block, temp_id),
new Invocation (
new MemberAccess ((Expression) $6, "GetEnumerator"), null));
current_block.AddStatement (new StatementExpression (assign_e));
ma = new MemberAccess (new LocalVariableReference (foreach_block, temp_id), "MoveNext");
child_block = new Block (current_block);
getcurrent = new StatementExpression (
new Assign (
new LocalVariableReference (foreach_block, (string) $4),
new Cast (
(string) $3,
new MemberAccess (
new LocalVariableReference (foreach_block, temp_id), "Current"))));
child_block.AddStatement (getcurrent);
child_block.AddStatement ((Statement) $8);
foreach_block.AddStatement (new While (ma, (Statement) child_block));
$$ = foreach_block;
}
;
jump_statement
: break_statement
| continue_statement
| goto_statement
| return_statement
| throw_statement
;
break_statement
: BREAK SEMICOLON
{
$$ = new Break ();
}
;
continue_statement
: CONTINUE SEMICOLON
{
$$ = new Continue ();
}
;
goto_statement
: GOTO IDENTIFIER SEMICOLON
{
$$ = new Goto ((string) $2);
}
| GOTO CASE constant_expression SEMICOLON
| GOTO DEFAULT SEMICOLON
;
return_statement
: RETURN opt_expression SEMICOLON
{
$$ = new Return ((Expression) $2);
}
;
throw_statement
: THROW opt_expression SEMICOLON
{
$$ = new Throw ((Expression) $2);
}
;
opt_expression
: /* empty */
| expression
;
try_statement
: TRY block catch_clauses
{
Catch g = null;
ArrayList s = new ArrayList ();
foreach (Catch cc in (ArrayList) $3) {
if (cc.Type == null)
g = cc;
else
s.Add (cc);
}
// Now s contains the list of specific catch clauses
// and g contains the general one.
$$ = new Try ((Block) $2, s, g, null);
}
| TRY block opt_catch_clauses FINALLY block
{
Catch g = null;
ArrayList s = new ArrayList ();
foreach (Catch cc in (ArrayList) $3) {
if (cc.Type == null)
g = cc;
else
s.Add (cc);
}
$$ = new Try ((Block) $2, s, g, (Block) $5);
}
;
opt_catch_clauses
: /* empty */ { $$ = null; }
| catch_clauses
;
catch_clauses
: catch_clause
{
ArrayList l = new ArrayList ();
l.Add ($1);
$$ = l;
}
| catch_clauses catch_clause
{
ArrayList l = (ArrayList) $1;
l.Add ($2);
$$ = l;
}
;
opt_identifier
: /* empty */ { $$ = null; }
| IDENTIFIER
;
catch_clause
: CATCH opt_catch_args block
{
string type = null;
string id = null;
if ($2 != null) {
DictionaryEntry cc = (DictionaryEntry) $2;
type = (string) cc.Key;
id = (string) cc.Value;
}
$$ = new Catch (type, id, (Block) $3);
}
;
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);
}
;
lock_statement
: LOCK OPEN_PARENS expression CLOSE_PARENS embedded_statement
{
$$ = new Lock ((Expression) $3, (Statement) $5);
}
;
using_statement
: USING OPEN_PARENS resource_acquisition CLOSE_PARENS embedded_statement
// finishme
;
resource_acquisition
: local_variable_declaration
expression
// finishme
;
%%
//
// A class used to pass around variable declarations and constants
//
public class VariableDeclaration {
public string identifier;
public object expression_or_array_initializer;
public VariableDeclaration (string id, object eoai){
this.identifier = id;
this.expression_or_array_initializer = eoai;
}
}
//
// A class used to hold info about an indexer declarator
//
public class IndexerDeclaration {
public string type;
public string interface_type;
public Parameters param_list;
public IndexerDeclaration (string type, string interface_type, Parameters param_list)
{
this.type = type;
this.interface_type = interface_type;
this.param_list = param_list;
}
}
//
// A class used to hold info about an operator declarator
//
public class OperatorDeclaration {
public Operator.OpType optype;
public string ret_type;
public string arg1type;
public string arg1name;
public string arg2type;
public string arg2name;
public OperatorDeclaration (Operator.OpType op, string ret_type, string arg1type, string arg1name,
string arg2type, string arg2name)
{
optype = op;
this.ret_type = ret_type;
this.arg1type = arg1type;
this.arg1name = arg1name;
this.arg2type = arg2type;
this.arg2name = arg2name;
}
}
//
// Given the @class_name name, it creates a fully qualified name
// based on the containing declaration space
//
string
MakeName (string class_name)
{
string ns = current_namespace.Name;
string container_name = current_container.Name;
if (container_name == ""){
if (ns != "")
return ns + "." + class_name;
else
return class_name;
} else
return container_name + "." + 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)
{
if (result == DeclSpace.AdditionResult.Success)
return;
Location l = lexer.Location;
switch (result){
case DeclSpace.AdditionResult.NameExists:
rc.Report.Error (102, l, "The namespace `" + current_container.Name +
"' already contains a definition for `"+
name + "'");
break;
// NEED TO HANDLE THIS IN SEMANTIC ANALYSIS:
//
// case DeclSpace.AdditionResult.MethodDuplicated:
// error (111, "Class `"+current_container.Name+
// "' already defines a member called '" +
// name + "' with the same parameter types");
// break;
case DeclSpace.AdditionResult.EnclosingClash:
rc.Report.Error (542, l, "Member names cannot be the same as their enclosing type");
break;
case DeclSpace.AdditionResult.NotAConstructor:
rc.Report.Error (1520, l, "Class, struct, or interface method must have a return type");
break;
}
}
void
CheckDef (bool result, string name)
{
if (result)
return;
CheckDef (DeclSpace.AdditionResult.NameExists, name);
}
object
SimpleLookup (string name)
{
//
// we need to check against current_block not being null
// as `expression' is allowed in argument_lists, which
// do not exist inside a block.
//
if (current_block != null){
if (current_block.IsVariableDefined (name))
return new LocalVariableReference (current_block, name);
}
if (current_local_parameters != null){
int idx;
Parameter par = current_local_parameters.GetParameterByName (name, out idx);
if (par != null)
return new ParameterReference (current_local_parameters, idx, name);
}
return null;
}
//
// Assumes that the name contains a `.' and tries to perform a simple lookup
// and shape the result to be a MemberAccess on a Local/Parameter
//
object CompositeLookup (string name)
{
int pos = name.IndexOf (".");
string left = name.Substring (0, pos);
object o;
Console.WriteLine ("Attempting: [" + left + "] " + name);
o = SimpleLookup (left);
if (o != null){
string right = name.Substring (pos + 1);
return new MemberAccess ((Expression) o, right);
}
return null;
}
object QualifiedIdentifier (string name)
{
object o;
if (name.IndexOf ('.') == -1)
o = SimpleLookup (name);
else
o = CompositeLookup (name);
if (o == null)
o = new SimpleName (name);
return o;
}
Block declare_local_variables (string type, ArrayList variable_declarators)
{
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, true);
else
implicit_block = new Block (current_block, true);
foreach (VariableDeclaration decl in variable_declarators){
if (implicit_block.AddVariable (type, decl.identifier)){
if (decl.expression_or_array_initializer != null){
if (inits == null)
inits = new ArrayList ();
inits.Add (decl);
}
} else {
Location l = lexer.Location;
rc.Report.Error (128, l, "A local variable `" + decl.identifier +
"' is already defined in this scope");
}
}
if (inits == null)
return implicit_block;
foreach (VariableDeclaration decl in inits){
if (decl.expression_or_array_initializer is Expression){
Expression expr = (Expression) decl.expression_or_array_initializer;
Assign assign;
assign = new Assign (new LocalVariableReference (implicit_block, decl.identifier), expr);
implicit_block.AddStatement (new StatementExpression (assign));
} else {
Console.WriteLine ("Not handling Array initializers yet");
}
}
return implicit_block;
}
void CheckConstant (Expression expr)
{
// finishme
}
void CheckBoolean (Expression expr)
{
// finishme
}
void CheckAttributeTarget (string a)
{
switch (a) {
case "assembly" : case "field" : case "method" : case "param" : case "property" : case "type" :
return;
default :
Location l = lexer.Location;
rc.Report.Error (658, l, "Invalid attribute target");
break;
}
}
void CheckUnaryOperator (Operator.OpType op)
{
switch (op) {
case Operator.OpType.Negate : case Operator.OpType.BitComplement : case Operator.OpType.Increment :
case Operator.OpType.Decrement :
case Operator.OpType.True : case Operator.OpType.False : case Operator.OpType.Add : case Operator.OpType.Subtract :
break;
default :
Location l = lexer.Location;
rc.Report.Error (1019, l, "Overloadable unary operator expected");
break;
}
}
void CheckBinaryOperator (Operator.OpType op)
{
switch (op) {
case Operator.OpType.Add : case Operator.OpType.Subtract : case Operator.OpType.Multiply :
case Operator.OpType.Divide :
case Operator.OpType.Modulo : case Operator.OpType.BitwiseAnd : case Operator.OpType.BitwiseOr :
case Operator.OpType.ExclusiveOr : case Operator.OpType.ShiftLeft : case Operator.OpType.ShiftRight :
case Operator.OpType.Equal : case Operator.OpType.NotEqual :
case Operator.OpType.GreaterThan : case Operator.OpType.LessThan : case Operator.OpType.GreaterOrEqual :
case Operator.OpType.LesserOrEqual :
break;
default :
Location l = lexer.Location;
rc.Report.Error (1020, l, "Overloadable binary operator expected");
break;
}
}
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(RootContext rc, string name, System.IO.Stream input)
{
current_namespace = new Namespace (null, "");
this.rc = rc;
this.tree = rc.Tree;
this.name = name;
this.input = input;
current_container = tree.Types;
current_container.Namespace = current_namespace;
lexer = new Tokenizer (input, name);
}
public override int parse ()
{
StringBuilder value = new StringBuilder ();
global_errors = 0;
try {
if (yacc_verbose_flag)
yyparse (lexer, new yydebug.yyDebugSimple ());
else
yyparse (lexer);
} catch (Exception e){
// Console.WriteLine ("Fatal error: " + name);
// Console.WriteLine (lexer.location);
Console.WriteLine (lexer.location + " : Parsing error");
Console.WriteLine (e);
global_errors++;
}
return global_errors;
}
/* end end end */
}