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

Example 11 with Action

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

the class ParserFactory method ruleRef.

@Override
public List<SrcOp> ruleRef(GrammarAST ID, GrammarAST label, GrammarAST args) {
    InvokeRule invokeOp = new InvokeRule(this, ID, label);
    // If no manual label and action refs as token/rule not label, we need to define implicit label
    if (controller.needsImplicitLabel(ID, invokeOp))
        defineImplicitLabel(ID, invokeOp);
    AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(invokeOp, label);
    return list(invokeOp, listLabelOp);
}

Example 12 with Action

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

the class BasicSemanticChecks method checkElementIsOuterMostInSingleAlt.

/**
	 Make sure that action is last element in outer alt; here action,
	 a2, z, and zz are bad, but a3 is ok:
	 (RULE A (BLOCK (ALT {action} 'a')))
	 (RULE B (BLOCK (ALT (BLOCK (ALT {a2} 'x') (ALT 'y')) {a3})))
	 (RULE C (BLOCK (ALT 'd' {z}) (ALT 'e' {zz})))
	 */
protected void checkElementIsOuterMostInSingleAlt(GrammarAST tree) {
    CommonTree alt = tree.parent;
    CommonTree blk = alt.parent;
    boolean outerMostAlt = blk.parent.getType() == RULE;
    Tree rule = tree.getAncestor(RULE);
    String fileName = tree.getToken().getInputStream().getSourceName();
    if (!outerMostAlt || blk.getChildCount() > 1) {
        ErrorType e = ErrorType.LEXER_COMMAND_PLACEMENT_ISSUE;
        g.tool.errMgr.grammarError(e, fileName, tree.getToken(), rule.getChild(0).getText());
    }
}

Example 13 with Action

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

the class BaseNodeTest 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 14 with Action

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

the class BasePythonTest 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 15 with Action

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

the class LexerATNFactory method action.

protected Handle action(GrammarAST node, LexerAction lexerAction) {
    ATNState left = newState(node);
    ATNState right = newState(node);
    boolean isCtxDependent = false;
    int lexerActionIndex = getLexerActionIndex(lexerAction);
    ActionTransition a = new ActionTransition(right, currentRule.index, lexerActionIndex, isCtxDependent);
    left.addTransition(a);
    node.atnState = left;
    Handle h = new Handle(left, right);
    return h;
}