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namespace Q1.Compiler;
using System.Reflection.Metadata;
using System.Text;
using visitors;
public class FunctionReference
{
// TODO: Implement return type
public string Name;
public CType Type;
public List<FunctionOverload> Overloads = new();
public FunctionReference(string name, CType type)
{
this.Type = type;
this.Name = name;
}
public string GetBranchName(FunctionOverload overload)
{
List<(string paramName, CType paramType)> parameters = overload
.ParameterNames
.Zip(overload.ParameterTypes)
.ToList();
StringBuilder branchName = new();
branchName.Append($"_{this.Name}");
if (parameters.Count > 0)
{
branchName.Append($"_{string.Join("__", parameters
.Select(x => $"{x.paramType}_{x.paramName}"))}");
}
return branchName.ToString();
}
public string GetBranchFriendlyName(FunctionOverload overload)
{
List<(string paramName, CType paramType)> parameters = overload
.ParameterNames
.Zip(overload.ParameterTypes)
.ToList();
StringBuilder branchName = new();
branchName.Append($"{this.Type} {this.Name}");
branchName.Append("(");
branchName.Append(string.Join(", ", parameters
.Select(x => $"{x.paramType} {x.paramName}")));
branchName.Append(")");
return branchName.ToString();
}
public FunctionOverload CreateOverloadWithBody(List<string> parameterNames, List<CType> parameterTypes)
{
FunctionOverload? existingOverload = this.Overloads
.FirstOrDefault(x => x.ParamsMatch(parameterNames, parameterTypes));
if (existingOverload != null)
{
if (existingOverload.BodyImplemented)
throw new CompilerException($"Cannot define another overload for {this.Name},"
+ $" as one with an identical signature and body already exists.");
existingOverload.BodyImplemented = true;
return existingOverload;
}
else
{
FunctionOverload newOverload = new(parameterNames, parameterTypes, true);
this.Overloads.Add(newOverload);
return newOverload;
}
}
public FunctionOverload CreateOverloadWithoutBody(List<string> parameterNames, List<CType> parameterTypes)
{
FunctionOverload? existingOverload = this.Overloads
.FirstOrDefault(x => x.ParamsMatch(parameterNames, parameterTypes));
if (existingOverload != null)
{
if (!existingOverload.BodyImplemented)
throw new CompilerException($"Cannot prototype another overload for {this.Name},"
+ $" as one with an identical signature already exists.");
return existingOverload;
}
else
{
FunctionOverload newOverload = new(parameterNames, parameterTypes, false);
this.Overloads.Add(newOverload);
return newOverload;
}
}
public FunctionOverload GetOverload(int paramsCount)
{
FunctionOverload? overload = this.Overloads
.FirstOrDefault(x => x.ParameterTypes.Count == paramsCount);
if (overload != null)
return overload;
throw new CompilerException($"Overload for {this.Name} with {paramsCount} arguments could not be found.");
}
}
public class FunctionOverload
{
public List<CType> ParameterTypes;
public List<string> ParameterNames;
public bool BodyImplemented;
public FunctionOverload(List<string> parameterNames, List<CType> parameterTypes, bool bodyImplemented)
{
this.ParameterTypes = parameterTypes;
this.ParameterNames = parameterNames;
this.BodyImplemented = bodyImplemented;
}
public bool ParamsMatch(List<string> parameterNames, List<CType> parameterTypes)
{
return this.ParameterNames.SequenceEqual(parameterNames)
&& this.ParameterTypes.SequenceEqual(parameterTypes);
}
}
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