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public static SignaturesMatch ( this a, |
||
| a | this | |
| b | ||
| return | bool | |
void EmitToString(Emit.PEModuleBuilder module)
{
if (this.IsInterface || this.IsTrait)
{
return;
}
var __tostring = this.GetMembersByPhpName(SpecialMethodNames.Tostring.Value).OfType <MethodSymbol>().FirstOrDefault();
if (__tostring != null) // implement ToString if: there is __toString() function
{
// lookup base string ToString()
var overriden = this.LookupMember <MethodSymbol>(
WellKnownMemberNames.ObjectToString,
m => OverrideHelper.SignaturesMatch(m, (MethodSymbol)DeclaringCompilation.GetSpecialTypeMember(SpecialMember.System_Object__ToString)));
Debug.Assert(overriden != null);
if (overriden == null || overriden.IsSealed || overriden.ContainingType == this)
{
// cannot be overriden
return;
}
// public sealed override string ToString()
var tostring = new SynthesizedMethodSymbol(this, WellKnownMemberNames.ObjectToString, false, true, DeclaringCompilation.CoreTypes.String, Accessibility.Public, isfinal: false, phphidden: true)
{
ExplicitOverride = overriden,
ForwardedCall = __tostring,
};
module.SetMethodBody(tostring, MethodGenerator.GenerateMethodBody(module, tostring, il =>
{
var thisPlace = new ArgPlace(this, 0);
var cg = new CodeGenerator(il, module, DiagnosticBag.GetInstance(), module.Compilation.Options.OptimizationLevel, false, this, new FieldPlace(thisPlace, this.ContextStore, module), thisPlace);
if (__tostring != null)
{
// __tostring().ToString()
cg.EmitConvert(cg.EmitForwardCall(__tostring, tostring, callvirt: true), 0, tostring.ReturnType);
}
else
{
// PhpException.ObjectToStringNotSupported(this)
cg.EmitThis();
cg.EmitPop(cg.EmitCall(ILOpCode.Call, cg.CoreTypes.PhpException.Method("ObjectToStringNotSupported", cg.CoreTypes.Object)));
// return ""
cg.Builder.EmitStringConstant(string.Empty);
}
cg.EmitRet(tostring.ReturnType);
}, null, DiagnosticBag.GetInstance(), false));
module.SynthesizedManager.AddMethod(this, tostring);
}
}
/// <summary>
/// Matches all methods that can be overriden (non-static, public or protected, abstract or virtual)
/// within this type sub-tree (this type, its base and interfaces)
/// with its override.
/// Methods without an override are either abstract or a ghost stup has to be synthesized.
/// </summary>
/// <param name="diagnostics"></param>
internal OverrideInfo[] ResolveOverrides(DiagnosticBag diagnostics)
{
if (_lazyOverrides != null)
{
// already resolved
return(_lazyOverrides);
}
// inherit abstracts from base type
// ignoring System.Object (we don't override its methods from PHP)
var overrides = new List <OverrideInfo>();
if (BaseType != null && BaseType.SpecialType != SpecialType.System_Object)
{
overrides.AddRange(BaseType.ResolveOverrides(diagnostics));
}
// collect this type declared methods including synthesized methods
var members = this.GetMembers();
// resolve overrides of inherited members
for (int i = 0; i < overrides.Count; i++)
{
var m = overrides[i];
if (m.HasOverride == false)
{
// update override info of the inherited member
overrides[i] = new OverrideInfo(m.Method, OverrideHelper.ResolveMethodImplementation(m.Method, members));
}
else
{
// clear the interface flag of inherited override info
m.ImplementsInterface = false;
overrides[i] = m;
}
}
// resolve overrides of interface methods
foreach (var iface in Interfaces)
{
// skip interfaces implemented by base type or other interfaces,
// we don't want to add redundant override entries:
if ((BaseType != null && BaseType.ImplementsInterface(iface)) ||
Interfaces.Any(x => x != iface && x.ImplementsInterface(iface)))
{
// iface is already handled within overrides => skip
// note: iface can be ignored in metadata at all actually
continue;
}
var iface_abstracts = iface.ResolveOverrides(diagnostics);
foreach (var m in iface_abstracts)
{
if (BaseType != null && m.Method.ContainingType != iface && BaseType.ImplementsInterface(m.Method.ContainingType))
{
// iface {m.Method.ContainingType} already handled within overrides => skip
continue;
}
// ignore interface method that is already implemented:
if (overrides.Any(o => OverrideHelper.SignaturesMatch(o.Method, m.Method)))
{
continue;
}
// add interface member,
// resolve its override
overrides.Add(new OverrideInfo(m.Method, this.IsInterface ? null : OverrideHelper.ResolveMethodImplementation(m.Method, this))
{
ImplementsInterface = true
});
}
}
// add overrideable routines from this type
foreach (var s in members)
{
if (s is MethodSymbol m && m.IsOverrideable())
{
overrides.Add(new OverrideInfo(m));
}
}
// handle unresolved abstracts
for (int i = 0; i < overrides.Count; i++)
{
var m = overrides[i];
if (m.IsUnresolvedAbstract && this is SourceTypeSymbol srct && !this.IsInterface)
{
if (!this.IsAbstract)
{
// Class '{0}' doesn't implement abstract method {1}::{2}()
diagnostics.Add(DiagnosticBagExtensions.ParserDiagnostic(srct.ContainingFile.SyntaxTree, srct.Syntax.HeadingSpan,
Devsense.PHP.Errors.Errors.AbstractMethodNotImplemented,
srct.FullName.ToString(), ((IPhpTypeSymbol)m.Method.ContainingType).FullName.ToString(), m.RoutineName));
}
else if (m.ImplementsInterface /*&& this.IsAbstract*/)
{
m.ImplementsInterface = false;
var method = m.Method;
Debug.Assert(!method.IsStatic);
Debug.Assert(method.DeclaredAccessibility != Accessibility.Private);
Debug.Assert(method.ContainingType.IsInterface);
// Template: abstract function {name}({parameters})
var ghost = new SynthesizedMethodSymbol(this, method.RoutineName,
isstatic: false, isvirtual: true, isabstract: true, isfinal: false,
returnType: method.ReturnType,
accessibility: method.DeclaredAccessibility);
ghost.SetParameters(SynthesizedParameterSymbol.Create(ghost, method.Parameters));
//module.SynthesizedManager.AddMethod(this, ghost); // will be added to synthesized manager by FinalizeMethodTable
m.Method = ghost; // replace the interface method with synthesized abstract method
// update overrides
overrides[i] = m;
}
}
}
// cache & return
return(_lazyOverrides = overrides.ToArray());
}
/// <summary>
/// Matches all methods that can be overriden (non-static, public or protected, abstract or virtual)
/// within this type sub-tree (this type, its base and interfaces)
/// with its override.
/// Methods without an override are either abstract or a ghost stup has to be synthesized.
/// </summary>
/// <param name="diagnostics"></param>
internal OverrideInfo[] ResolveOverrides(DiagnosticBag diagnostics)
{
if (_lazyOverrides != null)
{
// already resolved
return(_lazyOverrides);
}
// TODO: ignore System.Object ?
// inherit abstracts from base type
var overrides = new List <OverrideInfo>();
if (BaseType != null)
{
overrides.AddRange(BaseType.ResolveOverrides(diagnostics));
}
// collect this type declared methods including synthesized methods
var methods = this.GetMembers().OfType <MethodSymbol>();
var methodslookup = methods.Where(OverrideHelper.CanOverride).ToLookup(m => m.RoutineName, StringComparer.OrdinalIgnoreCase);
// resolve overrides of inherited members
for (int i = 0; i < overrides.Count; i++)
{
var m = overrides[i];
if (m.HasOverride == false)
{
// update override info of the inherited member
overrides[i] = new OverrideInfo(m.Method, OverrideHelper.ResolveMethodImplementation(m.Method, methodslookup[m.RoutineName]));
}
else
{
// clear the interface flag of inherited override info
m.ImplementsInterface = false;
overrides[i] = m;
}
}
// resolve overrides of interface methods
foreach (var iface in Interfaces)
{
// skip interfaces implemented by base type or other interfaces,
// we don't want to add redundant override entries:
if ((BaseType != null && BaseType.ImplementsInterface(iface)) ||
Interfaces.Any(x => x != iface && x.ImplementsInterface(iface)))
{
// iface is already handled within overrides => skip
// note: iface can be ignored in metadata at all actually
continue;
}
var iface_abstracts = iface.ResolveOverrides(diagnostics);
foreach (var m in iface_abstracts)
{
if (BaseType != null && m.Method.ContainingType != iface && BaseType.ImplementsInterface(m.Method.ContainingType))
{
// iface {m.Method.ContainingType} already handled within overrides => skip
continue;
}
// ignore interface method that is already implemented:
if (overrides.Any(o => OverrideHelper.SignaturesMatch(o.Method, m.Method)))
{
continue;
}
// add interface member,
// resolve its override
overrides.Add(new OverrideInfo(m.Method, this.IsInterface ? null : OverrideHelper.ResolveMethodImplementation(m.Method, this))
{
ImplementsInterface = true
});
}
}
// add overrideable routines from this type
foreach (var m in methods)
{
if (m.IsOverrideable())
{
overrides.Add(new OverrideInfo(m));
}
}
// report unresolved abstracts
if (!this.IsAbstract && !this.IsInterface && this is SourceTypeSymbol srct)
{
foreach (var m in overrides)
{
if (m.IsUnresolvedAbstract)
{
// Class '{0}' doesn't implement abstract method {1}::{2}()
diagnostics.Add(DiagnosticBagExtensions.ParserDiagnostic(srct.ContainingFile.SyntaxTree, srct.Syntax.HeadingSpan,
Devsense.PHP.Errors.Errors.AbstractMethodNotImplemented,
srct.FullName.ToString(), ((IPhpTypeSymbol)m.Method.ContainingType).FullName.ToString(), m.RoutineName));
}
}
}
// cache & return
return(_lazyOverrides = overrides.ToArray());
}