35 lines
996 B
C++
35 lines
996 B
C++
// 调用 ANTLR 生成的 Lexer/Parser，返回 parse tree。
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#include "frontend/AntlrDriver.h"
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#include <fstream>
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#include <sstream>
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#include <stdexcept>
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#include "SysYLexer.h"
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#include "SysYParser.h"
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#include "antlr4-runtime.h"
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AntlrResult ParseFileWithAntlr(const std::string& path) {
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std::ifstream fin(path);
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if (!fin.is_open()) {
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throw std::runtime_error("无法打开输入文件: " + path);
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}
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std::ostringstream ss;
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ss << fin.rdbuf();
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auto input = std::make_unique<antlr4::ANTLRInputStream>(ss.str());
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auto lexer = std::make_unique<SysYLexer>(input.get());
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auto tokens = std::make_unique<antlr4::CommonTokenStream>(lexer.get());
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auto parser = std::make_unique<SysYParser>(tokens.get());
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parser->removeErrorListeners();
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auto tree = parser->compUnit();
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AntlrResult result;
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result.input = std::move(input);
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result.lexer = std::move(lexer);
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result.tokens = std::move(tokens);
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result.parser = std::move(parser);
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result.tree = tree;
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return result;
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}
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