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support -=, *=, /= operators #5

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support -=, *=, /= operators #5

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a79a1e1
support -=, *=, /= operators
yinxin630 Aug 27, 2019
bab0431
add test case
yinxin630 Aug 27, 2019
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38 changes: 31 additions & 7 deletions src/gen.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
/// <reference path="./typescript.d.ts" />

import * as ts from 'typescript'
import { OpCode, OpValue, Label } from './opcode'
import { EnvironmentType } from './types'
Expand Down Expand Up @@ -270,6 +272,9 @@ export function gen(code: string): [(OpCode | OpValue)[], VObject[]] {
switch (binary.operatorToken.kind) {
case ts.SyntaxKind.EqualsToken:
case ts.SyntaxKind.PlusEqualsToken:
case ts.SyntaxKind.MinusEqualsToken:
case ts.SyntaxKind.AsteriskEqualsToken:
case ts.SyntaxKind.SlashEqualsToken:
visitAssignmentExpression(binary as ts.AssignmentExpression<ts.AssignmentOperatorToken>)
return
}
Expand Down Expand Up @@ -318,13 +323,32 @@ export function gen(code: string): [(OpCode | OpValue)[], VObject[]] {
break
}
case ts.SyntaxKind.PlusEqualsToken:
{
visitor(expr.right)
visitor(expr.left)
op.push(OpCode.Add)
visitLeftHandSideExpression(expr.left)
op.push(OpCode.Set)
}
visitor(expr.left)
visitor(expr.right)
op.push(OpCode.Add)
visitLeftHandSideExpression(expr.left)
op.push(OpCode.Set)
break
case ts.SyntaxKind.MinusEqualsToken:
visitor(expr.left)
visitor(expr.right)
op.push(OpCode.Sub)
visitLeftHandSideExpression(expr.left)
op.push(OpCode.Set)
break
case ts.SyntaxKind.AsteriskEqualsToken:
visitor(expr.left)
visitor(expr.right)
op.push(OpCode.Mul)
visitLeftHandSideExpression(expr.left)
op.push(OpCode.Set)
break
case ts.SyntaxKind.SlashEqualsToken:
visitor(expr.left)
visitor(expr.right)
op.push(OpCode.Div)
visitLeftHandSideExpression(expr.left)
op.push(OpCode.Set)
break
default:
throw new Error('not supported')
Expand Down
9 changes: 6 additions & 3 deletions tests/gen.test.ts
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Expand Up @@ -116,10 +116,13 @@ test(`should work with assignment`, () => {
run(code)
})

test(`should work with add assignment`, () => {
test(`should work with add / sub / mul / div assignment`, () => {
const code = `
let a = 1;
a += 233;
let a = 5;
a += 1;
a *= 4;
a /= 2;
a -= 1;
a
`
run(code)
Expand Down