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shader: Bug fix ++/-- must not be applied to a blank identifier

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This commit is contained in:
Hajime Hoshi 2020-09-14 00:32:47 +09:00
parent 3421598e64
commit fd51abfb0d
2 changed files with 17 additions and 5 deletions
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2
internal/shader/stmt.go
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@ -346,7 +346,7 @@ func (cs *compileState) parseStmt(block *block, fname string, stmt ast.Stmt, inP
})
case *ast.IncDecStmt:
exprs, _, ss, ok := cs.parseExpr(block, stmt.X, false)
exprs, _, ss, ok := cs.parseExpr(block, stmt.X, true)
if !ok {
return nil, false
}

20
shader_test.go
View File

@ -225,7 +225,7 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
return vec4(0)
}
`)); err != nil {
t.Errorf("error must be nil but non-nil: %v", err)
t.Error(err)
}
if _, err := NewShader([]byte(`package main
@ -236,7 +236,7 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
return vec4(0)
}
`)); err != nil {
t.Errorf("error must be nil but non-nil: %v", err)
t.Error(err)
}
}
@ -576,6 +576,8 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
t.Errorf("error must be non-nil but was nil")
}
// Increment statement treats a variable 'used'.
// https://play.golang.org/p/2RuYMrSLjt3
if _, err := NewShader([]byte(`package main
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
@ -583,8 +585,8 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
x++
return vec4(0)
}
`)); err == nil {
t.Errorf("error must be non-nil but was nil")
`)); err != nil {
t.Error(err)
}
}
@ -630,6 +632,16 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
_ = x
return vec4(0)
}
`)); err == nil {
t.Errorf("error must be non-nil but was nil")
}
if _, err := NewShader([]byte(`package main
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
_++
return vec4(0)
}
`)); err == nil {
t.Errorf("error must be non-nil but was nil")
}