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Improved parsing of expression-or-declaration statements.

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Done-with: Erik Verbruggen
This commit is contained in:
Roberto Raggi
2010-09-09 17:11:06 +02:00
parent be82d9dd3c
commit 52786e1e39
1 changed files with 30 additions and 17 deletions
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47
src/shared/cplusplus/Parser.cpp
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@@ -2936,8 +2936,14 @@ bool Parser::parseExpressionOrDeclarationStatement(StatementAST *&node)
const bool blocked = blockErrors(true);
ExpressionAST *expression = 0;
if (parseExpression(expression) && LA() == T_SEMICOLON) {
const unsigned semicolon_token = consumeToken();
const bool hasExpression = parseExpression(expression);
const unsigned afterExpression = cursor();
if (hasExpression/* && LA() == T_SEMICOLON*/) {
//const unsigned semicolon_token = consumeToken();
unsigned semicolon_token = 0;
if (LA() == T_SEMICOLON)
semicolon_token = cursor();
ExpressionStatementAST *as_expression = new (_pool) ExpressionStatementAST;
as_expression->expression = expression;
@@ -2951,6 +2957,7 @@ bool Parser::parseExpressionOrDeclarationStatement(StatementAST *&node)
if (! binary->left_expression->asBinaryExpression()) {
(void) blockErrors(blocked);
node = as_expression;
match(T_SEMICOLON, &as_expression->semicolon_token);
return true;
} else {
invalidAssignment = true;
@@ -2960,6 +2967,7 @@ bool Parser::parseExpressionOrDeclarationStatement(StatementAST *&node)
if (call->base_expression->asIdExpression() != 0) {
(void) blockErrors(blocked);
node = as_expression;
match(T_SEMICOLON, &as_expression->semicolon_token);
return true;
}
}
@@ -2968,30 +2976,35 @@ bool Parser::parseExpressionOrDeclarationStatement(StatementAST *&node)
DeclarationAST *declaration = 0;
if (parseSimpleDeclaration(declaration)) {
DeclarationStatementAST *as_declaration = new (_pool) DeclarationStatementAST;
as_declaration->declaration = declaration;
SimpleDeclarationAST *simple = declaration->asSimpleDeclaration();
if (simple->semicolon_token == semicolon_token && simple->decl_specifier_list && simple->declarator_list) {
DeclarationStatementAST *as_declaration = new (_pool) DeclarationStatementAST;
as_declaration->declaration = declaration;
if (invalidAssignment || (simple->decl_specifier_list != 0 && simple->declarator_list != 0)) {
node = as_declaration;
(void) blockErrors(blocked);
return true;
}
ExpressionOrDeclarationStatementAST *ast = new (_pool) ExpressionOrDeclarationStatementAST;
ast->declaration = as_declaration;
ast->expression = as_expression;
node = ast;
if (! semicolon_token || invalidAssignment || semicolon_token != simple->semicolon_token ||
(simple->decl_specifier_list != 0 && simple->declarator_list != 0)) {
node = as_declaration;
(void) blockErrors(blocked);
return true;
}
ExpressionOrDeclarationStatementAST *ast = new (_pool) ExpressionOrDeclarationStatementAST;
ast->declaration = as_declaration;
ast->expression = as_expression;
node = ast;
(void) blockErrors(blocked);
return true;
}
rewind(semicolon_token + 1);
(void) blockErrors(blocked);
rewind(afterExpression);
match(T_SEMICOLON, &as_expression->semicolon_token);
return true;
}
rewind(start);
(void) blockErrors(blocked);
return parseDeclarationStatement(node);
}