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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: case *ast.IncDecStmt:
exprs, _, ss, ok := cs.parseExpr(block, stmt.X, false) exprs, _, ss, ok := cs.parseExpr(block, stmt.X, true)
if !ok { if !ok {
return nil, false 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) return vec4(0)
} }
`)); err != nil { `)); err != nil {
t.Errorf("error must be nil but non-nil: %v", err) t.Error(err)
} }
if _, err := NewShader([]byte(`package main if _, err := NewShader([]byte(`package main
@ -236,7 +236,7 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
return vec4(0) return vec4(0)
} }
`)); err != nil { `)); 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") 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 if _, err := NewShader([]byte(`package main
func Fragment(position vec4, texCoord vec2, color vec4) vec4 { func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
@ -583,8 +585,8 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
x++ x++
return vec4(0) return vec4(0)
} }
`)); err == nil { `)); err != nil {
t.Errorf("error must be non-nil but was nil") t.Error(err)
} }
} }
@ -630,6 +632,16 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
_ = x _ = x
return vec4(0) 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 { `)); err == nil {
t.Errorf("error must be non-nil but was nil") t.Errorf("error must be non-nil but was nil")
} }