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patterns: Unified expression body parsing

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This commit is contained in:
WerWolv 2021-09-26 18:27:18 +02:00
parent ae9f4fa876
commit 7da8a5b1d8
3 changed files with 36 additions and 24 deletions
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5
plugins/libimhex/include/hex/pattern_language/ast_node.hpp
View File

@ -481,6 +481,9 @@ namespace hex::pl {
ASTNodeWhileStatement(const ASTNodeWhileStatement &other) : ASTNode(other) {
this->m_condition = other.m_condition->clone();
for (auto &statement : other.m_body)
this->m_body.push_back(statement->clone());
}
[[nodiscard]] ASTNode* clone() const override {
@ -1377,7 +1380,7 @@ namespace hex::pl {
continue;
} else {
bool found = false;
for (const auto &variable : searchScope | std::views::reverse) {
for (const auto &variable : (searchScope | std::views::reverse)) {
if (variable->getVariableName() == name) {
auto newPattern = variable->clone();
delete currPattern;

1
plugins/libimhex/include/hex/pattern_language/parser.hpp
View File

@ -93,6 +93,7 @@ namespace hex::pl {
ASTNode* parseFunctionStatement();
ASTNode* parseFunctionVariableAssignment();
ASTNode* parseFunctionReturnStatement();
std::vector<ASTNode*> parseStatementBody();
ASTNode* parseFunctionConditional();
ASTNode* parseFunctionWhileLoop();

54
plugins/libimhex/source/pattern_language/parser.cpp
View File

@ -533,6 +533,27 @@ namespace hex::pl {
return create(new ASTNodeReturnStatement(this->parseMathematicalExpression()));
}
std::vector<ASTNode*> Parser::parseStatementBody() {
std::vector<ASTNode*> body;
auto bodyCleanup = SCOPE_GUARD {
for (auto &node : body)
delete node;
};
if (MATCHES(sequence(SEPARATOR_CURLYBRACKETOPEN))) {
while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
body.push_back(parseFunctionStatement());
}
} else {
body.push_back(parseFunctionStatement());
}
bodyCleanup.release();
return body;
}
ASTNode* Parser::parseFunctionConditional() {
auto condition = parseMathematicalExpression();
std::vector<ASTNode*> trueBody, falseBody;
@ -545,22 +566,13 @@ namespace hex::pl {
delete statement;
};
if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE, SEPARATOR_CURLYBRACKETOPEN))) {
while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
trueBody.push_back(parseFunctionStatement());
}
} else if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE))) {
trueBody.push_back(parseFunctionStatement());
} else
throwParseError("expected body of conditional statement");
if (!MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE)))
throwParseError("expected closing ')' after statement head");
if (MATCHES(sequence(KEYWORD_ELSE, SEPARATOR_CURLYBRACKETOPEN))) {
while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
falseBody.push_back(parseFunctionStatement());
}
} else if (MATCHES(sequence(KEYWORD_ELSE))) {
falseBody.push_back(parseFunctionStatement());
}
trueBody = parseStatementBody();
if (MATCHES(sequence(KEYWORD_ELSE)))
falseBody = parseStatementBody();
cleanup.release();
@ -577,14 +589,10 @@ namespace hex::pl {
delete statement;
};
if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE, SEPARATOR_CURLYBRACKETOPEN))) {
while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
body.push_back(parseFunctionStatement());
}
} else if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE))) {
body.push_back(parseFunctionStatement());
} else
throwParseError("expected body of conditional statement");
if (!MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE)))
throwParseError("expected closing ')' after statement head");
body = parseStatementBody();
cleanup.release();