UnflavoredMeson/monkey
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Null my old friend

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This commit is contained in:
Chuck Smith
2024-02-07 16:02:06 -05:00
parent 77401260a2
commit 6ba2d3abe4
5 changed files with 42 additions and 16 deletions
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22
compiler/compiler.go
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@@ -134,16 +134,15 @@ func (c *Compiler) Compile(node ast.Node) error {
c.removeLastPop()
}
// Emit an `OnJump` with a bogus value
jumpPos := c.emit(code.OpJump, 9999)
afterConsequencePos := len(c.instructions)
c.changeOperand(jumpNotTruthyPos, afterConsequencePos)
if node.Alternative == nil {
afterConsequencePos := len(c.instructions)
c.changeOperand(jumpNotTruthyPos, afterConsequencePos)
c.emit(code.OpNull)
} else {
// Emit an `OnJump` with a bogus value
jumpPos := c.emit(code.OpJump, 9999)
afterConsequencePos := len(c.instructions)
c.changeOperand(jumpNotTruthyPos, afterConsequencePos)
err = c.Compile(node.Alternative)
if err != nil {
return err
@@ -152,12 +151,11 @@ func (c *Compiler) Compile(node ast.Node) error {
if c.lastInstructionIsPop() {
c.removeLastPop()
}
afterAlternativePos := len(c.instructions)
c.changeOperand(jumpPos, afterAlternativePos)
}
afterAlternativePos := len(c.instructions)
c.changeOperand(jumpPos, afterAlternativePos)
case *ast.BlockStatement:
for _, s := range node.Statements {
err := c.Compile(s)