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Implement casting from (Unicode) integer to string

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This commit is contained in:
Ayke van Laethem
2018-08-30 00:36:13 +02:00
parent fdc56d5940
commit d13c124df9
2 changed files with 52 additions and 1 deletions
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compiler.go
+15 -1
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@@ -2067,6 +2067,20 @@ func (c *Compiler) parseConvert(typeFrom, typeTo types.Type, value llvm.Value) (
if typeTo.Kind() == types.String {
switch typeFrom := typeFrom.Underlying().(type) {
case *types.Basic:
// Assume a Unicode code point, as that is the only possible
// value here.
// Cast to an i32 value as expected by
// runtime.stringFromUnicode.
if sizeFrom > 4 {
value = c.builder.CreateTrunc(value, llvm.Int32Type(), "")
} else if sizeFrom < 4 && typeTo.Info()&types.IsUnsigned != 0 {
value = c.builder.CreateZExt(value, llvm.Int32Type(), "")
} else if sizeFrom < 4 {
value = c.builder.CreateSExt(value, llvm.Int32Type(), "")
}
fn := c.mod.NamedFunction("runtime.stringFromUnicode")
return c.builder.CreateCall(fn, []llvm.Value{value}, ""), nil
case *types.Slice:
switch typeFrom.Elem().(*types.Basic).Kind() {
case types.Byte:
@@ -2082,7 +2096,7 @@ func (c *Compiler) parseConvert(typeFrom, typeTo types.Type, value llvm.Value) (
typeFrom := typeFrom.Underlying().(*types.Basic)
sizeTo := c.targetData.TypeAllocSize(llvmTypeTo)
if typeFrom.Info() & types.IsInteger != 0 && typeTo.Info() & types.IsInteger != 0 {
if typeFrom.Info()&types.IsInteger != 0 && typeTo.Info()&types.IsInteger != 0 {
// Conversion between two integers.
if sizeFrom > sizeTo {
return c.builder.CreateTrunc(value, llvmTypeTo, ""), nil