motiejus/zig
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implement coroutine resume

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This commit is contained in:
Andrew Kelley
2018-02-28 22:18:48 -05:00
parent c622766156
commit 8429d4ceac
8 changed files with 89 additions and 4 deletions
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27
src/parser.cpp
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@@ -1638,6 +1638,24 @@ static AstNode *ast_parse_cancel_expr(ParseContext *pc, size_t *token_index) {
return node;
}
/*
ResumeExpression = "resume" Expression;
*/
static AstNode *ast_parse_resume_expr(ParseContext *pc, size_t *token_index) {
Token *token = &pc->tokens->at(*token_index);
if (token->id != TokenIdKeywordResume) {
return nullptr;
}
*token_index += 1;
AstNode *node = ast_create_node(pc, NodeTypeResume, token);
node->data.resume_expr.expr = ast_parse_expression(pc, token_index, false);
return node;
}
/*
Defer(body) = ("defer" | "errdefer") body
*/
@@ -2266,7 +2284,7 @@ static AstNode *ast_parse_block_or_expression(ParseContext *pc, size_t *token_in
}
/*
Expression = TryExpression | ReturnExpression | BreakExpression | AssignmentExpression | CancelExpression
Expression = TryExpression | ReturnExpression | BreakExpression | AssignmentExpression | CancelExpression | ResumeExpression
*/
static AstNode *ast_parse_expression(ParseContext *pc, size_t *token_index, bool mandatory) {
Token *token = &pc->tokens->at(*token_index);
@@ -2287,6 +2305,10 @@ static AstNode *ast_parse_expression(ParseContext *pc, size_t *token_index, bool
if (cancel_expr)
return cancel_expr;
AstNode *resume_expr = ast_parse_resume_expr(pc, token_index);
if (resume_expr)
return resume_expr;
AstNode *ass_expr = ast_parse_ass_expr(pc, token_index, false);
if (ass_expr)
return ass_expr;
@@ -3060,6 +3082,9 @@ void ast_visit_node_children(AstNode *node, void (*visit)(AstNode **, void *cont
case NodeTypeCancel:
visit_field(&node->data.cancel_expr.expr, visit, context);
break;
case NodeTypeResume:
visit_field(&node->data.resume_expr.expr, visit, context);
break;
case NodeTypeAwaitExpr:
visit_field(&node->data.await_expr.expr, visit, context);
break;