motiejus/zig
1
Fork 0
Code Releases Activity

semantic analysis checks for multiple definitions of functions

Browse Source
This commit is contained in:
Andrew Kelley
2015-11-23 22:47:25 -07:00
parent a22bc8d20a
commit 3b4a2afb65
8 changed files with 389 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/parser.cpp
View File

@@ -133,9 +133,11 @@ struct ParseContext {
ZigList<Token> *tokens;
};
static AstNode *ast_create_node(NodeType type) {
static AstNode *ast_create_node(NodeType type, Token *first_token) {
AstNode *node = allocate<AstNode>(1);
node->type = type;
node->line = first_token->start_line;
node->column = first_token->start_column;
return node;
}
@@ -163,11 +165,11 @@ Type : token(Symbol) | PointerType;
PointerType : token(Star) token(Const) Type | token(Star) token(Mut) Type;
*/
static AstNode *ast_parse_type(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeType);
Token *token = &pc->tokens->at(token_index);
token_index += 1;
AstNode *node = ast_create_node(NodeTypeType, token);
if (token->id == TokenIdSymbol) {
node->data.type.type = AstNodeTypeTypePrimitive;
ast_buf_from_token(pc, token, &node->data.type.primitive_name);
@@ -197,12 +199,13 @@ ParamDecl<node> : token(Symbol) token(Colon) Type {
};
*/
static AstNode *ast_parse_param_decl(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeParamDecl);
Token *param_name = &pc->tokens->at(token_index);
token_index += 1;
ast_expect_token(pc, param_name, TokenIdSymbol);
AstNode *node = ast_create_node(NodeTypeParamDecl, param_name);
ast_buf_from_token(pc, param_name, &node->data.param_decl.name);
Token *colon = &pc->tokens->at(token_index);
@@ -280,12 +283,13 @@ static void ast_parse_fn_call_param_list(ParseContext *pc, int token_index, int
FnCall : token(Symbol) token(LParen) list(Expression, token(Comma)) token(RParen) ;
*/
static AstNode *ast_parse_fn_call(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeFnCall);
Token *fn_name = &pc->tokens->at(token_index);
token_index += 1;
ast_expect_token(pc, fn_name, TokenIdSymbol);
AstNode *node = ast_create_node(NodeTypeFnCall, fn_name);
ast_buf_from_token(pc, fn_name, &node->data.fn_call.name);
ast_parse_fn_call_param_list(pc, token_index, &token_index, &node->data.fn_call.params);
@@ -295,9 +299,8 @@ static AstNode *ast_parse_fn_call(ParseContext *pc, int token_index, int *new_to
}
static AstNode *ast_parse_expression(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeExpression);
Token *token = &pc->tokens->at(token_index);
AstNode *node = ast_create_node(NodeTypeExpression, token);
if (token->id == TokenIdSymbol) {
node->data.expression.type = AstNodeExpressionTypeFnCall;
node->data.expression.data.fn_call = ast_parse_fn_call(pc, token_index, &token_index);
@@ -329,9 +332,9 @@ Expression : token(Number) | token(String) | FnCall ;
FnCall : token(Symbol) token(LParen) list(Expression, token(Comma)) token(RParen) ;
*/
static AstNode *ast_parse_statement(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeStatement);
Token *token = &pc->tokens->at(token_index);
AstNode *node = ast_create_node(NodeTypeStatement, token);
if (token->id == TokenIdKeywordReturn) {
token_index += 1;
node->data.statement.type = AstNodeStatementTypeReturn;
@@ -362,12 +365,13 @@ static AstNode *ast_parse_statement(ParseContext *pc, int token_index, int *new_
Block : token(LBrace) many(Statement) token(RBrace);
*/
static AstNode *ast_parse_block(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeBlock);
Token *l_brace = &pc->tokens->at(token_index);
token_index += 1;
ast_expect_token(pc, l_brace, TokenIdLBrace);
AstNode *node = ast_create_node(NodeTypeBlock, l_brace);
for (;;) {
Token *token = &pc->tokens->at(token_index);
if (token->id == TokenIdRBrace) {
@@ -386,12 +390,13 @@ static AstNode *ast_parse_block(ParseContext *pc, int token_index, int *new_toke
FnDecl : token(Fn) token(Symbol) ParamDeclList option(token(Arrow) Type) Block;
*/
static AstNode *ast_parse_fn_decl(ParseContext *pc, int token_index, int *new_token_index) {
AstNode *node = ast_create_node(NodeTypeFnDecl);
Token *fn_token = &pc->tokens->at(token_index);
token_index += 1;
ast_expect_token(pc, fn_token, TokenIdKeywordFn);
AstNode *node = ast_create_node(NodeTypeFnDecl, fn_token);
Token *fn_name = &pc->tokens->at(token_index);
token_index += 1;
ast_expect_token(pc, fn_name, TokenIdSymbol);
@@ -437,7 +442,7 @@ static void ast_parse_fn_decl_list(ParseContext *pc, int token_index, ZigList<As
AstNode *ast_parse(Buf *buf, ZigList<Token> *tokens) {
ParseContext pc = {0};
pc.buf = buf;
pc.root = ast_create_node(NodeTypeRoot);
pc.root = ast_create_node(NodeTypeRoot, &tokens->at(0));
pc.tokens = tokens;
int new_token_index;