7

我正在努力让 ANTLR 3.2 在 C++ 中生成解析器/词法分析器。这是徒劳的。不过，Java 和 C 进展顺利。

我正在使用本教程开始：http ://www.ibm.com/developerworks/aix/library/au-c_plusplus_antlr/index.html

当我检查 *.stg 文件时，我发现：

CPP只有

./tool/src/main/resources/org/antlr/codegen/templates/CPP/CPP.stg

C有很多文件：

./tool/src/main/resources/org/antlr/codegen/templates/C/AST.stg
./tool/src/main/resources/org/antlr/codegen/templates/C/ASTDbg.stg
./tool/src/main/resources/org/antlr/codegen/templates/C/ASTParser.stg
./tool/src/main/resources/org/antlr/codegen/templates/C/ASTTreeParser.stg
./tool/src/main/resources/org/antlr/codegen/templates/C/C.stg
./tool/src/main/resources/org/antlr/codegen/templates/C/Dbg.stg

其他语言也是如此。

我的CG文件：

grammar C;

options { language='CPP'; }

/** Match things like "call foo;" */
r : 'call' ID ';' {System.out.println("invoke "+$ID.text);} ;
ID: ('a'..'z'|'A'..'Z'|'_')('0'..'9'|'a'..'z'|'A'..'Z'|'_')* ;
WS: (' ' |'\n' |'\r' )+ {$channel=HIDDEN;} ; // ignore whitespace

错误：

error(10):  internal error: group Cpp does not satisfy interface ANTLRCore: missing templates [lexerRuleRefAndListLabel, parameterSetAttributeRef, scopeSetAttributeRef, returnSetAttributeRef, lexerRulePropertyRef_text, lexerRulePropertyRef_type, lexerRulePropertyRef_line, lexerRulePropertyRef_pos, lexerRulePropertyRef_index, lexerRulePropertyRef_channel, lexerRulePropertyRef_start, lexerRulePropertyRef_stop, ruleSetPropertyRef_tree, ruleSetPropertyRef_st] 

error(10):  internal error: group Cpp does not satisfy interface ANTLRCore: mismatched arguments on these templates [outputFile(LEXER, PARSER, TREE_PARSER, actionScope, actions, docComment, recognizer, name, tokens, tokenNames, rules, cyclicDFAs, bitsets, buildTemplate, buildAST, rewriteMode, profile, backtracking, synpreds, memoize, numRules, fileName, ANTLRVersion, generatedTimestamp, trace, scopes, superClass, literals), optional headerFile(LEXER, PARSER, TREE_PARSER, actionScope, actions, docComment, recognizer, name, tokens, tokenNames, rules, cyclicDFAs, bitsets, buildTemplate, buildAST, rewriteMode, profile, backtracking, synpreds, memoize, numRules, fileName, ANTLRVersion, generatedTimestamp, trace, scopes, superClass, literals), lexer(grammar, name, tokens, scopes, rules, numRules, labelType, filterMode, superClass), rule(ruleName, ruleDescriptor, block, emptyRule, description, exceptions, finally, memoize), alt(elements, altNum, description, autoAST, outerAlt, treeLevel, rew), tokenRef(token, label, elementIndex, hetero), tokenRefAndListLabel(token, label, elementIndex, hetero), listLabel(label, elem), charRangeRef(a, b, label), ruleRef(rule, label, elementIndex, args, scope), ruleRefAndListLabel(rule, label, elementIndex, args, scope), lexerRuleRef(rule, label, args, elementIndex, scope), lexerMatchEOF(label, elementIndex), tree(root, actionsAfterRoot, children, nullableChildList, enclosingTreeLevel, treeLevel)] 

error(10):  internal error: C.g : java.lang.IllegalArgumentException: Can't find template actionGate.st; group hierarchy is [Cpp]

... 等等。

请多多指教。谢谢！我正在使用 Leopard 10.5.8

CLASSPATH=:/Users/vietlq/projects/antlr-3.2.jar:/Users/vietlq/projects/stringtemplate-3.2.1/lib/stringtemplate-3.2.1.jar:/Users/vietlq/projects/stringtemplate-3.2.1/lib/antlr-2.7.7.jar
4

2 回答 2

9

It sounds like you've answered your own question: ANTLR's C++ lexer/parser generators are not yet functional.

For what it's worth, it's still possible to use ANTLR for parsing from C++, via the C target. I use ANTLR to generate a C language lexer and parser, which I then compile and link to my C++ code.

I have one C++ file that translates an ANTLR parse tree to my target abstract syntax tree classes, and the rest of my code doesn't care where the AST comes from. It works pretty well in practice! It would be easy to replace ANTLR with a different parser generator, and I find that the separation leads to cleaner ANTLR grammars.

于 2010-02-22T01:29:55.527 回答
4

我已经为 ANTLR 发布了一个 C++ 目标。请检查一下。

于 2012-02-16T14:10:21.853 回答