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Greater than and Less Than
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This commit is contained in:
Chuck Smith
2024-03-18 16:17:13 -04:00
parent d454572870
commit b47a39e1b2
11 changed files with 116 additions and 43 deletions
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10
compiler/compiler.go
View File

@@ -81,7 +81,7 @@ func (c *Compiler) Compile(node ast.Node) error {
}
case *ast.InfixExpression:
if node.Operator == "<" {
if node.Operator == "<" || node.Operator == "<=" {
err := c.Compile(node.Right)
if err != nil {
return err
@@ -91,7 +91,11 @@ func (c *Compiler) Compile(node ast.Node) error {
if err != nil {
return err
}
c.emit(code.OpGreaterThan)
if node.Operator == "<=" {
c.emit(code.OpGreaterThanEqual)
} else {
c.emit(code.OpGreaterThan)
}
return nil
}
@@ -116,6 +120,8 @@ func (c *Compiler) Compile(node ast.Node) error {
c.emit(code.OpDiv)
case ">":
c.emit(code.OpGreaterThan)
case ">=":
c.emit(code.OpGreaterThanEqual)
case "==":
c.emit(code.OpEqual)
case "!=":

20
compiler/compiler_test.go
View File

@@ -120,6 +120,26 @@ func TestBooleanExpressions(t *testing.T) {
code.Make(code.OpPop),
},
},
{
input: "1 >= 2",
expectedConstants: []interface{}{1, 2},
expectedInstructions: []code.Instructions{
code.Make(code.OpConstant, 0),
code.Make(code.OpConstant, 1),
code.Make(code.OpGreaterThanEqual),
code.Make(code.OpPop),
},
},
{
input: "1 <= 2",
expectedConstants: []interface{}{2, 1},
expectedInstructions: []code.Instructions{
code.Make(code.OpConstant, 0),
code.Make(code.OpConstant, 1),
code.Make(code.OpGreaterThanEqual),
code.Make(code.OpPop),
},
},
{
input: "1 == 2",
expectedConstants: []interface{}{1, 2},