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Parsing for stmt

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This commit is contained in:
Krzosa Karol
2022-05-31 16:45:20 +02:00
parent 41697dec80
commit 20accf8293
4 changed files with 75 additions and 13 deletions
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36
new_parse.cpp
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@@ -135,14 +135,14 @@ Compound literals
*/
function Ast_Expr *parse_expr(S64 rbp = 0);
function Ast_Binary *
function Ast_Expr *
parse_init_stmt(Ast_Expr *expr){
Token *token = token_get();
if(token_match(TK_Colon)){
if(expr->kind != AST_IDENT) parsing_error(token, "Failed to parse init stmt, expected left of [:] to be a token of kind [Identifier]");
if(token_match(TK_Assign)){
Ast_Expr *value = parse_expr();
Ast_Binary *result = (Ast_Binary *)ast_expr_binary((Ast_Atom *)expr, value, token);
Ast_Expr *result = ast_expr_binary((Ast_Atom *)expr, value, token);
return result;
}
else not_implemented;
@@ -210,17 +210,35 @@ parse_block(){
Ast_Return *return_stmt = ast_return(token, expr);
stmts.add(return_stmt);
}
else if(token_match_keyword(keyword_for)){
Ast_Expr *expr_first = parse_expr();
Ast_Expr *init = parse_init_stmt(expr_first);
Ast_Expr *actual_init = init ? init : expr_first;
Ast_Expr *cond = 0;
Ast_Expr *iter = 0;
if(token_match(TK_Comma)){
cond = parse_expr();
if(token_match(TK_Comma)){
iter = parse_expr();
}
}
stmts.add(ast_for(token, actual_init, cond, iter, parse_block()));
}
else if(token_match_keyword(keyword_if)){
Array<Ast_If_Node *> if_nodes = {scratch};
Ast_Expr *expr = parse_expr();
Ast_Binary *init_val = parse_init_stmt(expr);
Ast_Expr *init_val = parse_init_stmt(expr);
if(init_val){
if(token_match(TK_Comma)) expr = parse_expr();
else expr = 0;
}
Ast_Block *block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, init_val, expr, block);
Ast_Block *if_block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, init_val, expr, if_block);
if_nodes.add(if_node);
while(token_is(SAME_SCOPE) && token_is_keyword(keyword_else, 1)){
@@ -228,13 +246,13 @@ parse_block(){
token = token_next();
if(token_match_keyword(keyword_if)){
Ast_Expr *expr = parse_expr();
Ast_Block *block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, 0, expr, block);
Ast_Block *else_if_block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, 0, expr, else_if_block);
if_nodes.add(if_node);
}
else{
Ast_Block *block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, 0, 0, block);
Ast_Block *else_block = parse_block();
Ast_If_Node *if_node = ast_if_node(token, 0, 0, else_block);
if_nodes.add(if_node);
break;
}