爱特每羊队
167 lines
9.7 KiB
Rust
167 lines
9.7 KiB
Rust
use super::*;
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impl Compiler {
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pub(in crate::emitter) fn emit_assignment_expression(
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&self, assign: &oxide_parser::AssignmentExpression, ctx: &mut CompileCtx,
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) -> Result<u8, String> {
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if let oxide_parser::AssignmentTarget::StaticMemberExpression(member) = &assign.left {
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if let Some(logical_op) = assign.operator.to_logical_operator() {
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let id = ctx.next_label_id();
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let store_label = Label::TernaryElse(id);
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let end_label = Label::TernaryEnd(id);
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let obj_reg = self.emit_expression(&member.object, ctx)?;
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let prop_name = member.property.name.as_str();
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let idx = ctx.add_constant(Constant::String(prop_name.to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.emit_load_const(key_reg, idx);
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let result_reg = ctx.alloc_reg();
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ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, obj_reg, 0));
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ctx.emit(opcode::encode(OpCode::IC_GET_PROP, 0, result_reg, key_reg));
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ctx.emit(0);
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ctx.emit(0);
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ctx.emit(0);
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self.emit_logical_assign_test(logical_op, result_reg, store_label, end_label, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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ctx.emit(opcode::encode(OpCode::IC_SET_PROP, obj_reg, val_reg, key_reg));
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ctx.emit(0);
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ctx.emit(0);
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ctx.emit(0);
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ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, val_reg, 0));
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return Ok(result_reg);
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}
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let obj_reg = self.emit_expression(&member.object, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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let prop_name = member.property.name.as_str();
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let idx = ctx.add_constant(Constant::String(prop_name.to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.emit_load_const(key_reg, idx);
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if assign.operator != AssignmentOperator::Assign {
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let op = match assign.operator {
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AssignmentOperator::Addition => OpCode::COMPOUND_MEMBER_ADD,
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AssignmentOperator::Subtraction => OpCode::COMPOUND_MEMBER_SUB,
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AssignmentOperator::Multiplication => OpCode::COMPOUND_MEMBER_MUL,
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AssignmentOperator::Division => OpCode::COMPOUND_MEMBER_DIV,
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AssignmentOperator::Remainder => OpCode::COMPOUND_MEMBER_MOD,
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AssignmentOperator::Exponential => OpCode::COMPOUND_MEMBER_EXP,
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_ => return Err(format!("compound assignment operator {:?} not supported", assign.operator)),
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};
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ctx.emit(opcode::encode(op, obj_reg, val_reg, key_reg));
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ctx.emit(0);
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ctx.emit(0);
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ctx.emit(0);
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Ok(val_reg)
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} else {
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ctx.emit(opcode::encode(OpCode::IC_SET_PROP, obj_reg, val_reg, key_reg));
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ctx.emit(0);
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ctx.emit(0);
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ctx.emit(0);
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Ok(val_reg)
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}
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} else if let oxide_parser::AssignmentTarget::ComputedMemberExpression(member) = &assign.left {
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if let Some(logical_op) = assign.operator.to_logical_operator() {
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let id = ctx.next_label_id();
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let store_label = Label::TernaryElse(id);
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let end_label = Label::TernaryEnd(id);
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let obj_reg = self.emit_expression(&member.object, ctx)?;
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let key_reg = self.emit_expression(&member.expression, ctx)?;
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let result_reg = ctx.alloc_reg();
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ctx.emit(opcode::encode(OpCode::GET_PROP_DYNAMIC, obj_reg, key_reg, result_reg));
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self.emit_logical_assign_test(logical_op, result_reg, store_label, end_label, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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ctx.emit(opcode::encode(OpCode::SET_PROP_DYNAMIC, obj_reg, key_reg, val_reg));
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ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, val_reg, 0));
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return Ok(result_reg);
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}
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let obj_reg = self.emit_expression(&member.object, ctx)?;
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let key_reg = self.emit_expression(&member.expression, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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ctx.emit(opcode::encode(OpCode::SET_PROP_DYNAMIC, obj_reg, key_reg, val_reg));
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Ok(val_reg)
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} else if let oxide_parser::AssignmentTarget::PrivateFieldExpression(member) = &assign.left {
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if assign.operator != AssignmentOperator::Assign {
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return Err("compound assignment to private fields not supported".into());
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}
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let obj_reg = self.emit_expression(&member.object, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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let key_reg = self.emit_private_id_reg(member.field.name.as_str(), ctx)?;
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ctx.emit(opcode::encode(OpCode::SET_PRIVATE, obj_reg, val_reg, key_reg));
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Ok(val_reg)
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} else if let oxide_parser::AssignmentTarget::AssignmentTargetIdentifier(id_ref) = &assign.left {
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if assign.operator != AssignmentOperator::Assign {
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if let Some(logical_op) = assign.operator.to_logical_operator() {
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let id = ctx.next_label_id();
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let store_label = Label::TernaryElse(id);
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let end_label = Label::TernaryEnd(id);
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let name = id_ref.name.as_str();
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let var_reg = ctx.lookup_or_global(name);
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let result_reg = ctx.alloc_reg();
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ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, var_reg, 0));
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self.emit_logical_assign_test(logical_op, result_reg, store_label, end_label, ctx)?;
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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let is_const = ctx.lookup_const_flag(name);
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let const_flag = if is_const { 1 } else { 0 };
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ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, const_flag));
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ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, val_reg, 0));
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Ok(result_reg)
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} else if assign.operator == AssignmentOperator::Addition
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|| assign.operator == AssignmentOperator::Subtraction
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|| assign.operator == AssignmentOperator::Multiplication
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|| assign.operator == AssignmentOperator::Division
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|| assign.operator == AssignmentOperator::Remainder
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|| assign.operator == AssignmentOperator::Exponential
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|| assign.operator == AssignmentOperator::BitwiseAnd
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|| assign.operator == AssignmentOperator::BitwiseOR
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|| assign.operator == AssignmentOperator::BitwiseXOR
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|| assign.operator == AssignmentOperator::ShiftLeft
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|| assign.operator == AssignmentOperator::ShiftRight
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|| assign.operator == AssignmentOperator::ShiftRightZeroFill
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{
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let rhs = self.emit_expression(&assign.right, ctx)?;
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let name = id_ref.name.as_str();
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let var_reg = ctx.lookup_or_global(name);
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let op = match assign.operator {
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AssignmentOperator::Addition => OpCode::COMPOUND_ADD,
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AssignmentOperator::Subtraction => OpCode::COMPOUND_SUB,
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AssignmentOperator::Multiplication => OpCode::COMPOUND_MUL,
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AssignmentOperator::Division => OpCode::COMPOUND_DIV,
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AssignmentOperator::Remainder => OpCode::COMPOUND_MOD,
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AssignmentOperator::Exponential => OpCode::COMPOUND_EXP,
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AssignmentOperator::BitwiseAnd => OpCode::COMPOUND_AND,
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AssignmentOperator::BitwiseOR => OpCode::COMPOUND_OR,
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AssignmentOperator::BitwiseXOR => OpCode::COMPOUND_XOR,
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AssignmentOperator::ShiftLeft => OpCode::COMPOUND_SHL,
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AssignmentOperator::ShiftRight => OpCode::COMPOUND_SHR,
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AssignmentOperator::ShiftRightZeroFill => OpCode::COMPOUND_USHR,
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_ => return Err(format!("compound assignment operator {:?} not supported", assign.operator)),
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};
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ctx.emit(opcode::encode(op, var_reg, rhs, 0));
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Ok(var_reg)
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} else {
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Err(format!("compound assignment operator {:?} not supported", assign.operator))
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}
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} else {
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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let name = id_ref.name.as_str();
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let var_reg = ctx.lookup_or_global(name);
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let is_const = ctx.lookup_const_flag(name);
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let const_flag = if is_const { 1 } else { 0 };
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ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, const_flag));
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Ok(val_reg)
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}
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} else if matches!(
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&assign.left,
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oxide_parser::AssignmentTarget::ArrayAssignmentTarget(_)
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| oxide_parser::AssignmentTarget::ObjectAssignmentTarget(_)
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) {
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if assign.operator != AssignmentOperator::Assign {
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return Err("compound destructuring assignment not supported".into());
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}
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let val_reg = self.emit_expression(&assign.right, ctx)?;
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self.emit_assign_target(&assign.left, val_reg, ctx)?;
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Ok(val_reg)
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} else {
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Err("assignment target not supported".into())
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}
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}
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}
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