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feat: 支持自增自减运算符

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彭俊皓
2026-06-06 20:31:57 +08:00
parent 8c3f4aabe6
commit 69e2c2eba1
7 changed files with 226 additions and 3 deletions
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crates/oxide_compiler/src/emitter.rs
+18 -1
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@@ -1,7 +1,8 @@
use crate::compiler::Label;
use crate::opcode::{self, OpCode};
use oxide_parser::{
AssignmentOperator, Expression, ForStatementInit, ForStatementLeft, Statement, UnaryOperator,
AssignmentOperator, Expression, ForStatementInit, ForStatementLeft, SimpleAssignmentTarget,
Statement, UnaryOperator, UpdateOperator,
};
use crate::compiler::{is_int_literal, is_side_effect_free, BinaryOperator, CompileCtx, Compiler};
@@ -655,6 +656,22 @@ impl Compiler {
Err("assignment target not supported".into())
}
}
Expression::UpdateExpression(update) => match &update.argument {
SimpleAssignmentTarget::AssignmentTargetIdentifier(id) => {
let name = id.name.as_str();
let var_reg = ctx.lookup_or_global(name);
let result_reg = ctx.alloc_reg();
let op = match (update.operator, update.prefix) {
(UpdateOperator::Increment, true) => OpCode::INC_PRE,
(UpdateOperator::Increment, false) => OpCode::INC_POST,
(UpdateOperator::Decrement, true) => OpCode::DEC_PRE,
(UpdateOperator::Decrement, false) => OpCode::DEC_POST,
};
ctx.emit(opcode::encode(op, var_reg, result_reg, result_reg));
Ok(result_reg)
}
_ => Err("member update not yet supported".into()),
},
Expression::Identifier(ident) => {
let var_reg = ctx.lookup(ident.name.as_str())?;
let r = ctx.alloc_reg();