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internal/shader: bug fix: evaluate the builtin float/int functions in the pre-compile phase correctly

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Closes #2011
This commit is contained in:
Hajime Hoshi 2022-03-10 00:46:11 +09:00
parent 47bfd0db9e
commit de05ede27e
1 changed files with 23 additions and 1 deletions
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24
internal/shader/expr.go
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@ -291,7 +291,9 @@ func (cs *compileState) parseExpr(block *block, expr ast.Expr, markLocalVariable
// For built-in functions, we can call this in this position. Return an expression for the function
// call.
if callee.Type == shaderir.BuiltinFuncExpr {
if callee.BuiltinFunc == shaderir.Len || callee.BuiltinFunc == shaderir.Cap {
// Process compile-time evaluations.
switch callee.BuiltinFunc {
case shaderir.Len, shaderir.Cap:
if len(args) != 1 {
cs.addError(e.Pos(), fmt.Sprintf("number of %s's arguments must be 1 but %d", callee.BuiltinFunc, len(args)))
return nil, nil, nil, false
@ -307,6 +309,26 @@ func (cs *compileState) parseExpr(block *block, expr ast.Expr, markLocalVariable
ConstType: shaderir.ConstTypeInt,
},
}, []shaderir.Type{{Main: shaderir.Int}}, stmts, true
case shaderir.IntF:
if args[0].Type == shaderir.NumberExpr && canTruncateToInteger(args[0].Const) {
return []shaderir.Expr{
{
Type: shaderir.NumberExpr,
Const: gconstant.ToInt(args[0].Const),
ConstType: shaderir.ConstTypeInt,
},
}, []shaderir.Type{{Main: shaderir.Int}}, stmts, true
}
case shaderir.FloatF:
if args[0].Type == shaderir.NumberExpr {
return []shaderir.Expr{
{
Type: shaderir.NumberExpr,
Const: gconstant.ToFloat(args[0].Const),
ConstType: shaderir.ConstTypeFloat,
},
}, []shaderir.Type{{Main: shaderir.Float}}, stmts, true
}
}
var t shaderir.Type