Method createMapDelete

compiler/map.go:152–180

createMapDelete deletes a key from a map by calling the appropriate runtime function. It is the implementation of the Go delete() builtin.

(keyType types.Type, m, key llvm.Value, pos token.Pos)

// createMapDelete deletes a key from a map by calling the appropriate runtime
// function. It is the implementation of the Go delete() builtin.
func (b *builder) createMapDelete(keyType types.Type, m, key llvm.Value, pos token.Pos) error {
	origKeyType := keyType
	keyType = keyType.Underlying()
	if t, ok := keyType.(*types.Basic); ok && t.Info()&types.IsString != 0 {
		// key is a string
		params := []llvm.Value{m, key}
		b.createRuntimeCall("hashmapStringDelete", params, "")
		return nil
	} else if hashmapIsBinaryKey(keyType) {
		keyAlloca, keySize := b.createTemporaryAlloca(key.Type(), "hashmap.key")
		b.CreateStore(key, keyAlloca)
		b.zeroUndefBytes(b.getLLVMType(keyType), keyAlloca)
		params := []llvm.Value{m, keyAlloca}
		b.createRuntimeCall("hashmapBinaryDelete", params, "")
		b.emitLifetimeEnd(keyAlloca, keySize)
		return nil
	} else {
		// Key is not trivially comparable, so compare it as an interface
		// instead.
		itfKey := key
		if _, ok := keyType.(*types.Interface); !ok {
			// Not already an interface, so convert it to an interface first.
			itfKey = b.createMakeInterface(key, origKeyType, pos)
		}
		params := []llvm.Value{m, itfKey}
		b.createRuntimeCall("hashmapInterfaceDelete", params, "")
		return nil
	}
}

// Clear the given map.
func (b *builder) createMapClear(m llvm.Value) {