public static void New()
{
CompilationScope mainScope = new CompilationScope
{
instructions = new Instructions {
},
lastInstruction = new EmittedInstruction {
},
previousInstruction = new EmittedInstruction {
},
};
symbol_table.SymbolTable symbolTable = symbol_table.NewSymbolTable();
for (int i = 0; i < Object.builtins.Builtins.Length; i++)
{
Object._BuiltinDefinition v = Object.builtins.Builtins[i];
symbol_table.DefineBuiltin(ref symbolTable, i, v.Name);
}
compiler = new Compiler_t
{
constants = new List <Object.Object>(),
symbolTable = symbolTable,
scopes = new List <CompilationScope> {
mainScope
},
scopeIndex = 0,
};
}
static void replaceLastPopWithReturn()
{
int lastPos = compiler.scopes[compiler.scopeIndex].lastInstruction.Position;
replaceInstruction(lastPos, code.Make(Opcode.OpReturnValue));
CompilationScope _scope = compiler.scopes[compiler.scopeIndex];
_scope.lastInstruction.Opcode = Opcode.OpReturnValue;
compiler.scopes[compiler.scopeIndex] = _scope;
}
static void setLastInstruction(Opcode op, int pos)
{
EmittedInstruction previous = compiler.scopes[compiler.scopeIndex].lastInstruction;
EmittedInstruction last = new EmittedInstruction {
Opcode = op, Position = pos
};
CompilationScope _scope = compiler.scopes[compiler.scopeIndex];
_scope.previousInstruction = previous;
_scope.lastInstruction = last;
compiler.scopes[compiler.scopeIndex] = _scope;
}
static void replaceInstruction(int pos, List <byte> newInstruction)
{
List <byte> ins = currentInstructions();
for (int i = 0; i < newInstruction.Count; i++)
{
ins[pos + i] = newInstruction[i];
}
CompilationScope _scope = compiler.scopes[compiler.scopeIndex];
_scope.instructions = ins;
compiler.scopes[compiler.scopeIndex] = _scope;
}
static void enterScope()
{
CompilationScope scope = new CompilationScope
{
instructions = new Instructions {
},
lastInstruction = new EmittedInstruction {
},
previousInstruction = new EmittedInstruction {
},
};
compiler.scopes.Add(scope);
compiler.scopeIndex++;
compiler.symbolTable = symbol_table.NewEnclosedSymbolTable(compiler.symbolTable);
}
static void removeLastPop()
{
EmittedInstruction last = compiler.scopes[compiler.scopeIndex].lastInstruction;
EmittedInstruction previous = compiler.scopes[compiler.scopeIndex].previousInstruction;
List <byte> old = currentInstructions();
List <byte> new_ = new List <byte>(last.Position + 1);
for (int i = 0; i < last.Position; i++)
{
new_.Add(old[i]);
}
CompilationScope _scope = compiler.scopes[compiler.scopeIndex];
_scope.instructions = new_;
_scope.lastInstruction = previous;
compiler.scopes[compiler.scopeIndex] = _scope;
}
