Examples with Action org.antlr.v4.codegen.model.Action used on opensource projects

Example 16 with Action

use of org.antlr.v4.codegen.model.Action in project antlr4 by antlr.

the class LexerATNFactory method lexerCallCommand.

@Override
public Handle lexerCallCommand(GrammarAST ID, GrammarAST arg) {
    LexerAction lexerAction = createLexerAction(ID, arg);
    if (lexerAction != null) {
        return action(ID, lexerAction);
    }
    // fall back to standard action generation for the command
    ST cmdST = codegenTemplates.getInstanceOf("Lexer" + CharSupport.capitalize(ID.getText()) + "Command");
    if (cmdST == null) {
        g.tool.errMgr.grammarError(ErrorType.INVALID_LEXER_COMMAND, g.fileName, ID.token, ID.getText());
        return epsilon(ID);
    }
    if (cmdST.impl.formalArguments == null || !cmdST.impl.formalArguments.containsKey("arg")) {
        g.tool.errMgr.grammarError(ErrorType.UNWANTED_LEXER_COMMAND_ARGUMENT, g.fileName, ID.token, ID.getText());
        return epsilon(ID);
    }
    cmdST.add("arg", arg.getText());
    cmdST.add("grammar", arg.g);
    return action(cmdST.render());
}

Example 17 with Action

use of org.antlr.v4.codegen.model.Action in project antlr4 by antlr.

the class ActionTranslator method attr.

@Override
public void attr(String expr, Token x) {
    gen.g.tool.log("action-translator", "attr " + x);
    Attribute a = node.resolver.resolveToAttribute(x.getText(), node);
    if (a != null) {
        switch(a.dict.type) {
            case ARG:
                chunks.add(new ArgRef(nodeContext, x.getText()));
                break;
            case RET:
                chunks.add(new RetValueRef(rf.ruleCtx, x.getText()));
                break;
            case LOCAL:
                chunks.add(new LocalRef(nodeContext, x.getText()));
                break;
            case PREDEFINED_RULE:
                chunks.add(getRulePropertyRef(x));
                break;
        }
    }
    if (node.resolver.resolvesToToken(x.getText(), node)) {
        // $label
        chunks.add(new TokenRef(nodeContext, getTokenLabel(x.getText())));
        return;
    }
    if (node.resolver.resolvesToLabel(x.getText(), node)) {
        // $x for x=ID etc...
        chunks.add(new LabelRef(nodeContext, getTokenLabel(x.getText())));
        return;
    }
    if (node.resolver.resolvesToListLabel(x.getText(), node)) {
        // $ids for ids+=ID etc...
        chunks.add(new ListLabelRef(nodeContext, x.getText()));
        return;
    }
    Rule r = factory.getGrammar().getRule(x.getText());
    if (r != null) {
        // $r for r rule ref
        chunks.add(new LabelRef(nodeContext, getRuleLabel(x.getText())));
    }
}

Example 18 with Action

use of org.antlr.v4.codegen.model.Action in project antlr4 by antlr.

the class ActionTranslator method translateAction.

public static List<ActionChunk> translateAction(OutputModelFactory factory, RuleFunction rf, Token tokenWithinAction, ActionAST node) {
    String action = tokenWithinAction.getText();
    if (action != null && action.length() > 0 && action.charAt(0) == '{') {
        int firstCurly = action.indexOf('{');
        int lastCurly = action.lastIndexOf('}');
        if (firstCurly >= 0 && lastCurly >= 0) {
            // trim {...}
            action = action.substring(firstCurly + 1, lastCurly);
        }
    }
    return translateActionChunk(factory, rf, action, node);
}

Example 19 with Action

use of org.antlr.v4.codegen.model.Action in project antlr4 by antlr.

the class BaseCppTest method testActions.

public void testActions(String templates, String actionName, String action, String expected) throws org.antlr.runtime.RecognitionException {
    int lp = templates.indexOf('(');
    String name = templates.substring(0, lp);
    STGroup group = new STGroupString(templates);
    ST st = group.getInstanceOf(name);
    st.add(actionName, action);
    String grammar = st.render();
    ErrorQueue equeue = new ErrorQueue();
    Grammar g = new Grammar(grammar, equeue);
    if (g.ast != null && !g.ast.hasErrors) {
        SemanticPipeline sem = new SemanticPipeline(g);
        sem.process();
        ATNFactory factory = new ParserATNFactory(g);
        if (g.isLexer())
            factory = new LexerATNFactory((LexerGrammar) g);
        g.atn = factory.createATN();
        CodeGenerator gen = new CodeGenerator(g);
        ST outputFileST = gen.generateParser();
        String output = outputFileST.render();
        //System.out.println(output);
        String b = "#" + actionName + "#";
        int start = output.indexOf(b);
        String e = "#end-" + actionName + "#";
        int end = output.indexOf(e);
        String snippet = output.substring(start + b.length(), end);
        assertEquals(expected, snippet);
    }
    if (equeue.size() > 0) {
        System.err.println(equeue.toString());
    }
}

Example 20 with Action

use of org.antlr.v4.codegen.model.Action in project antlr4 by antlr.

the class BaseBrowserTest method testActions.

public void testActions(String templates, String actionName, String action, String expected) throws org.antlr.runtime.RecognitionException {
    int lp = templates.indexOf('(');
    String name = templates.substring(0, lp);
    STGroup group = new STGroupString(templates);
    ST st = group.getInstanceOf(name);
    st.add(actionName, action);
    String grammar = st.render();
    ErrorQueue equeue = new ErrorQueue();
    Grammar g = new Grammar(grammar, equeue);
    if (g.ast != null && !g.ast.hasErrors) {
        SemanticPipeline sem = new SemanticPipeline(g);
        sem.process();
        ATNFactory factory = new ParserATNFactory(g);
        if (g.isLexer())
            factory = new LexerATNFactory((LexerGrammar) g);
        g.atn = factory.createATN();
        CodeGenerator gen = new CodeGenerator(g);
        ST outputFileST = gen.generateParser();
        String output = outputFileST.render();
        //System.out.println(output);
        String b = "#" + actionName + "#";
        int start = output.indexOf(b);
        String e = "#end-" + actionName + "#";
        int end = output.indexOf(e);
        String snippet = output.substring(start + b.length(), end);
        assertEquals(expected, snippet);
    }
    if (equeue.size() > 0) {
        System.err.println(equeue.toString());
    }
}