using System.Reflection.Emit;
using System.Collections;
-namespace Mono.CSharp {
+namespace Mono.MonoBASIC {
/// <summary>
/// Represents a single method parameter
/// </summary>
- public class Parameter {
+ public class Parameter : Attributable {
+ ParameterBuilder builder;
+
[Flags]
public enum Modifier : byte {
NONE = 0,
+ VAL = 0,
REF = 1,
OUT = 2,
PARAMS = 4,
// This is a flag which says that it's either REF or OUT.
- ISBYREF = 8
+ ISBYREF = 8,
+ OPTIONAL = 16
}
public readonly Expression TypeName;
public readonly Modifier ModFlags;
- public Attributes OptAttributes;
public readonly string Name;
public Type parameter_type;
-
+ public readonly Expression ParameterInitializer;
+ public readonly bool IsOptional;
+
public Parameter (Expression type, string name, Modifier mod, Attributes attrs)
+ : base (attrs)
+ {
+ Name = name;
+ ModFlags = mod;
+ TypeName = type;
+ ParameterInitializer = null;
+ IsOptional = false;
+ }
+
+ public Parameter (Expression type, string name, Modifier mod, Attributes attrs, Expression pi)
+ : base (attrs)
+ {
+ Name = name;
+ ModFlags = mod;
+ TypeName = type;
+ ParameterInitializer = pi;
+ IsOptional = false;
+ }
+
+ public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
+ {
+ if (a.Type == TypeManager.marshal_as_attr_type) {
+ UnmanagedMarshal marshal = UnmanagedMarshal.DefineUnmanagedMarshal (a.UnmanagedType);
+ builder.SetMarshal (marshal);
+ } else
+ builder.SetCustomAttribute (cb);
+ }
+
+ public Parameter (Expression type, string name, Modifier mod, Attributes attrs, Expression pi, bool opt)
+ : base (attrs)
{
Name = name;
ModFlags = mod;
TypeName = type;
- OptAttributes = attrs;
+ ParameterInitializer = pi;
+ IsOptional = opt;
}
+ public override AttributeTargets AttributeTargets {
+ get {
+ return AttributeTargets.Parameter;
+ }
+ }
+
// <summary>
// Resolve is used in method definitions
// </summary>
return ParameterAttributes.None;
case Modifier.OUT:
return ParameterAttributes.Out;
+ case Modifier.OPTIONAL:
+ return ParameterAttributes.Optional;
case Modifier.PARAMS:
return 0;
}
return ExternalType (ds, loc).FullName;
}
+
+ public void DefineParameter (EmitContext ec, MethodBuilder mb, ConstructorBuilder cb, int index, Location loc)
+ {
+ if (mb == null)
+ builder = cb.DefineParameter (index, Attributes, Name);
+ else
+ builder = mb.DefineParameter (index, Attributes, Name);
+
+ if (ParameterInitializer != null) {
+ if (ParameterInitializer is MemberAccess) {
+ MemberAccess ma = ParameterInitializer as MemberAccess;
+
+ Expression const_ex = ma.Resolve(ec);
+ if (const_ex is EnumConstant)
+ builder.SetConstant (((EnumConstant) const_ex).Child.GetValue());
+ else
+ Report.Error(-1, "Internal error - Non supported argument type in optional parameter");
+ }
+ else
+ builder.SetConstant (((Constant) ParameterInitializer).GetValue());
+ }
+
+ if (OptAttributes != null)
+ OptAttributes.Emit (ec, this);
+ }
}
/// <summary>
ArrayParameter = array_parameter;
loc = l;
}
-
+
/// <summary>
/// This is used to reuse a set of empty parameters, because they
/// are common
}
}
+ public bool HasOptional()
+ {
+ bool res = false;
+
+ foreach (Parameter p in FixedParameters)
+ {
+ if (p.IsOptional)
+ {
+ res = true;
+ break;
+ }
+ }
+ return (res);
+ }
+
+ /// <summary>
+ /// Returns the number of standard (i.e. non-optional) parameters
+ /// </summary>
+ public int CountStandardParams()
+ {
+ int res = 0;
+ if (FixedParameters == null)
+ return 0;
+
+ foreach (Parameter p in FixedParameters) {
+ if (!p.IsOptional)
+ res++;
+ }
+ return (res);
+ }
+
+ /// <summary>
+ /// Returns the number of optional parameters
+ /// </summary>
+ public int CountOptionalParams()
+ {
+ int res = 0;
+ if (FixedParameters == null)
+ return 0;
+
+ foreach (Parameter p in FixedParameters) {
+ if (p.IsOptional)
+ res++;
+ }
+ return (res);
+ }
+
+ public Expression GetDefaultValue (int i)
+ {
+ Parameter p = FixedParameters[i];
+ if (p.IsOptional)
+ return p.ParameterInitializer;
+ else
+ return null;
+ }
+
public void AppendParameter (Parameter p)
+ {
+ if (FixedParameters != null)
+ {
+ Parameter [] pa = new Parameter [FixedParameters.Length+1];
+ FixedParameters.CopyTo (pa, 0);
+ pa[FixedParameters.Length] = p;
+ FixedParameters = pa;
+ }
+ else
+ {
+ FixedParameters = new Parameter [1];
+ FixedParameters[0] = p;
+ }
+ }
+
+ public void PrependParameter (Parameter p)
{
Parameter [] pa = new Parameter [FixedParameters.Length+1];
- FixedParameters.CopyTo (pa, 0);
- pa[FixedParameters.Length] = p;
- FixedParameters = pa;
+ FixedParameters.CopyTo (pa, 1);
+ pa[0] = p;
+ FixedParameters = pa;
+ }
+
+ public Parameters Copy (Location l)
+ {
+ Parameters p = new Parameters (null, null, l);
+ p.FixedParameters = new Parameter[this.FixedParameters.Length];
+ this.FixedParameters.CopyTo (p.FixedParameters, 0);
+
+ return (p);
+
}
public bool Empty {
// For now this is the only correc thing to do
return CallingConventions.Standard;
}
- }
-}
-
+ public void LabelParameters (EmitContext ec, MethodBase builder, Location loc)
+ {
+ //
+ // Define each type attribute (in/out/ref) and
+ // the argument names.
+ //
+ Parameter [] p = FixedParameters;
+ int i = 0;
+
+ MethodBuilder mb = null;
+ ConstructorBuilder cb = null;
+ if (builder is MethodBuilder)
+ mb = (MethodBuilder) builder;
+ else
+ cb = (ConstructorBuilder) builder;
+
+ if (p != null){
+ for (i = 0; i < p.Length; i++) {
+ p [i].DefineParameter (ec, mb, cb, i + 1, loc);
+ }
+ }
+
+ if (ArrayParameter != null) {
+ ParameterBuilder pb;
+ Parameter array_param = ArrayParameter;
+
+ if (mb == null)
+ pb = cb.DefineParameter (i + 1, array_param.Attributes, array_param.Name);
+ else
+ pb = mb.DefineParameter (i + 1, array_param.Attributes, array_param.Name);
+
+ CustomAttributeBuilder a = new CustomAttributeBuilder (TypeManager.cons_param_array_attribute, new object [0]);
+ pb.SetCustomAttribute (a);
+ }
+ }
+
+ }
+}