motiejus/zig
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add undefined literal

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This commit is contained in:
Andrew Kelley
2016-01-22 22:42:02 -07:00
parent 523e3b86af
commit 0e51c16ef5
4 changed files with 54 additions and 21 deletions
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14
src/parser.cpp
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@@ -129,6 +129,8 @@ const char *node_type_str(NodeType node_type) {
return "BoolLiteral";
case NodeTypeNullLiteral:
return "NullLiteral";
case NodeTypeUndefinedLiteral:
return "UndefinedLiteral";
case NodeTypeIfBoolExpr:
return "IfBoolExpr";
case NodeTypeIfVarExpr:
@@ -412,6 +414,9 @@ void ast_print(AstNode *node, int indent) {
case NodeTypeContinue:
fprintf(stderr, "%s\n", node_type_str(node->type));
break;
case NodeTypeUndefinedLiteral:
fprintf(stderr, "%s\n", node_type_str(node->type));
break;
case NodeTypeAsmExpr:
fprintf(stderr, "%s\n", node_type_str(node->type));
break;
@@ -1368,7 +1373,7 @@ static AstNode *ast_parse_asm_expr(ParseContext *pc, int *token_index, bool mand
/*
PrimaryExpression : "Number" | "String" | "CharLiteral" | KeywordLiteral | GroupedExpression | GotoExpression | BlockExpression | "Symbol" | ("@" "Symbol" FnCallExpression) | ArrayType | AsmExpression | ("%." "Symbol")
KeywordLiteral : token(True) | token(False) | token(Null) | token(Break) | token(Continue)
KeywordLiteral : "true" | "false" | "null" | "break" | "continue" | "undefined"
*/
static AstNode *ast_parse_primary_expr(ParseContext *pc, int *token_index, bool mandatory) {
Token *token = &pc->tokens->at(*token_index);
@@ -1410,6 +1415,10 @@ static AstNode *ast_parse_primary_expr(ParseContext *pc, int *token_index, bool
AstNode *node = ast_create_node(pc, NodeTypeContinue, token);
*token_index += 1;
return node;
} else if (token->id == TokenIdKeywordUndefined) {
AstNode *node = ast_create_node(pc, NodeTypeUndefinedLiteral, token);
*token_index += 1;
return node;
} else if (token->id == TokenIdAtSign) {
*token_index += 1;
Token *name_tok = ast_eat_token(pc, token_index, TokenIdSymbol);
@@ -3202,6 +3211,9 @@ void normalize_parent_ptrs(AstNode *node) {
case NodeTypeNullLiteral:
// none
break;
case NodeTypeUndefinedLiteral:
// none
break;
case NodeTypeIfBoolExpr:
set_field(&node->data.if_bool_expr.condition);
set_field(&node->data.if_bool_expr.then_block);