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Implemented loops

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This commit is contained in:
Rafał Grodziński
2025-06-26 15:50:18 +09:00
parent ac9205e23e
commit 293522315b
4 changed files with 58 additions and 32 deletions
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45
src/Parser/Parser.cpp
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@@ -183,32 +183,41 @@ shared_ptr<Statement> Parser::matchStatementLoop() {
if (!tryMatchingTokenKinds({TokenKind::REPEAT}, true, true))
return nullptr;
shared_ptr<Statement> initStatement;
shared_ptr<Expression> preConditionExpression;
shared_ptr<Expression> postConditionExpression;
// initial
shared_ptr<Statement> initStatement = matchStatementVariable();
initStatement = matchStatementVariable();
if (initStatement != nullptr && !initStatement->isValid())
initStatement = nullptr;
// got initial, expect comma
if (initStatement != nullptr && !tryMatchingTokenKinds({TokenKind::COMMA}, true, true))
return matchStatementInvalid("Expected comma after initial statement");
if (tokens.at(currentIndex-1)->getKind() != TokenKind::NEW_LINE) {
// got initial, expect comma
if (initStatement != nullptr && !tryMatchingTokenKinds({TokenKind::COMMA}, true, true))
return matchStatementInvalid("Expected comma after initial statement");
// pre condition
shared_ptr<Expression> preConditionExpression = nextExpression();
if (preConditionExpression != nullptr && !preConditionExpression->isValid())
return matchStatementInvalid("Expected pre-condition expression");
// pre condition
preConditionExpression = nextExpression();
if (preConditionExpression != nullptr && !preConditionExpression->isValid())
return matchStatementInvalid("Expected pre-condition expression");
// post condition
shared_ptr<Expression> postConditionExpression;
if (tryMatchingTokenKinds({TokenKind::COMMA}, true, true)) {
postConditionExpression = nextExpression();
if (postConditionExpression == nullptr || !postConditionExpression->isValid())
return matchStatementInvalid("Expected post-condition expression");
if (!tryMatchingTokenKinds({TokenKind::NEW_LINE}, true, true)) {
// got pre-condition, expect comma
if (!tryMatchingTokenKinds({TokenKind::COMMA}, true, true))
return matchStatementInvalid("Expected comma after pre-condition statement");
// post condition
postConditionExpression = nextExpression();
if (postConditionExpression == nullptr || !postConditionExpression->isValid())
return matchStatementInvalid("Expected post-condition expression");
// epxect new line
if (!tryMatchingTokenKinds({TokenKind::NEW_LINE}, true, true))
return matchStatementInvalid("Expected new line");
}
}
// epxect new line
if (!tryMatchingTokenKinds({TokenKind::NEW_LINE}, true, true))
return matchStatementInvalid("Expected new line");
// body
shared_ptr<Statement> bodyBlockStatement = matchStatementBlock({TokenKind::SEMICOLON}, true);
if (bodyBlockStatement == nullptr)