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shader: Let detectType return multiple types

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This commit is contained in:
Hajime Hoshi 2020-06-07 23:32:50 +09:00
parent c986da8970
commit 3fd8062fbe
1 changed files with 26 additions and 18 deletions
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44
internal/shader/shader.go
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@ -320,7 +320,11 @@ func (s *compileState) parseVariable(block *block, vs *ast.ValueSpec) ([]variabl
if len(vs.Values) > 0 {
init = vs.Values[i]
if t.Main == shaderir.None {
t = s.detectType(block, init)
ts := s.detectType(block, init)
if len(ts) > 1 {
s.addError(vs.Pos(), fmt.Sprintf("the numbers of lhs and rhs don't match"))
}
t = ts[0]
}
}
name := n.Name
@ -510,7 +514,11 @@ func (cs *compileState) parseBlock(outer *block, b *ast.BlockStmt, inParams, out
v := variable{
name: e.(*ast.Ident).Name,
}
v.typ = cs.detectType(block, l.Rhs[i])
ts := cs.detectType(block, l.Rhs[i])
if len(ts) > 1 {
cs.addError(l.Pos(), fmt.Sprintf("the numbers of lhs and rhs don't match"))
}
v.typ = ts[0]
block.vars = append(block.vars, v)
block.ir.LocalVars = append(block.ir.LocalVars, v.typ)
@ -574,52 +582,52 @@ func (cs *compileState) parseBlock(outer *block, b *ast.BlockStmt, inParams, out
return block
}
func (s *compileState) detectType(b *block, expr ast.Expr) shaderir.Type {
func (s *compileState) detectType(b *block, expr ast.Expr) []shaderir.Type {
switch e := expr.(type) {
case *ast.BasicLit:
switch e.Kind {
case token.FLOAT:
return shaderir.Type{Main: shaderir.Float}
return []shaderir.Type{{Main: shaderir.Float}}
case token.INT:
return shaderir.Type{Main: shaderir.Int}
return []shaderir.Type{{Main: shaderir.Int}}
}
s.addError(expr.Pos(), fmt.Sprintf("unexpected literal: %s", e.Value))
return shaderir.Type{}
return nil
case *ast.CallExpr:
n := e.Fun.(*ast.Ident).Name
f, ok := shaderir.ParseBuiltinFunc(n)
if ok {
switch f {
case shaderir.Vec2F:
return shaderir.Type{Main: shaderir.Vec2}
return []shaderir.Type{{Main: shaderir.Vec2}}
case shaderir.Vec3F:
return shaderir.Type{Main: shaderir.Vec3}
return []shaderir.Type{{Main: shaderir.Vec3}}
case shaderir.Vec4F:
return shaderir.Type{Main: shaderir.Vec4}
return []shaderir.Type{{Main: shaderir.Vec4}}
case shaderir.Mat2F:
return shaderir.Type{Main: shaderir.Mat2}
return []shaderir.Type{{Main: shaderir.Mat2}}
case shaderir.Mat3F:
return shaderir.Type{Main: shaderir.Mat3}
return []shaderir.Type{{Main: shaderir.Mat3}}
case shaderir.Mat4F:
return shaderir.Type{Main: shaderir.Mat4}
return []shaderir.Type{{Main: shaderir.Mat4}}
// TODO: Add more functions
}
}
s.addError(expr.Pos(), fmt.Sprintf("unexpected call: %s", n))
return shaderir.Type{}
return nil
case *ast.CompositeLit:
return s.parseType(e.Type)
return []shaderir.Type{s.parseType(e.Type)}
case *ast.Ident:
n := e.Name
for _, v := range b.vars {
if v.name == n {
return v.typ
return []shaderir.Type{v.typ}
}
}
if b == &s.global {
for i, v := range s.uniforms {
if v == n {
return s.ir.Uniforms[i]
return []shaderir.Type{s.ir.Uniforms[i]}
}
}
}
@ -627,12 +635,12 @@ func (s *compileState) detectType(b *block, expr ast.Expr) shaderir.Type {
return s.detectType(b.outer, e)
}
s.addError(expr.Pos(), fmt.Sprintf("unexpected identifier: %s", n))
return shaderir.Type{}
return nil
//case *ast.SelectorExpr:
//return fmt.Sprintf("%s.%s", dumpExpr(e.X), dumpExpr(e.Sel))
default:
s.addError(expr.Pos(), fmt.Sprintf("detecting type not implemented: %#v", expr))
return shaderir.Type{}
return nil
}
}