public override void Emit(CodeWriter writer)
{
Condition.Emit(writer);
var endLabel = new Label();
if (this.FalseBody == null)
{
// single body
writer.JumpWhenFalse(endLabel);
TrueBody.Emit(writer);
}
else
{
// double body
var falseLabel = new Label();
writer.JumpWhenFalse(falseLabel);
TrueBody.Emit(writer);
writer.Jump(endLabel);
writer.DefineLabel(falseLabel);
FalseBody.Emit(writer);
}
writer.DefineLabel(endLabel);
}
public override string WriteLua(int indentLevel)
{
StringBuilder str = new StringBuilder();
if (IsElseIf)
{
str.Append($"elseif {Condition} then\n");
}
else
{
str.Append($"if {Condition} then\n");
}
if (TrueBody != null)
{
str.Append(TrueBody.PrintBlock(indentLevel).AddIndent());
}
if (FalseBody != null)
{
str.Append("\n");
// Check for elseif
if (FalseBody.Instructions.Count() == 1 && FalseBody.Instructions.First() is IfStatement s && s.Follow == null)
{
s.IsElseIf = true;
str.Append(FalseBody.PrintBlock(indentLevel));
}
else
{
for (int i = 0; i < indentLevel; i++)
{
str.Append("\t");
}
str.Append("else\n");
str.Append(FalseBody.PrintBlock(indentLevel).AddIndent());
}
}
public override void Compile(sunCompiler compiler)
{
Condition.Compile(compiler);
var falsePrologue = new sunJumpNotEqualSite(compiler.Binary);
TrueBody.Compile(compiler);
var trueEpilogue = new sunJumpSite(compiler.Binary);
falsePrologue.Relocate();
FalseBody.Compile(compiler);
trueEpilogue.Relocate();
}
public override void Compile(sunCompiler compiler)
{
Condition.Compile(compiler);
var trueBodyEpilogue = new sunJumpNotEqualSite(compiler.Binary);
TrueBody.Compile(compiler);
var falseBody = FalseBody;
if (falseBody != null)
{
var falseBodyEpilogue = new sunJumpSite(compiler.Binary);
trueBodyEpilogue.Relocate();
falseBody.Compile(compiler);
falseBodyEpilogue.Relocate();
}
else
{
trueBodyEpilogue.Relocate();
}
}
sunExpressionFlags sunTerm.GetExpressionFlags(sunContext context)
{
return(Condition.Analyze(context) | TrueBody.Analyze(context) | FalseBody.Analyze(context));
}
public override string ToString()
{
return($"if ({Condition.ToString()}) {TrueBody.ToString()}");
}
