List of usage examples for org.antlr.v4.runtime ParserRuleContext getChild
@Override
public ParseTree getChild(int i)
From source file:PostParser.java
License:Open Source License
/** * {@inheritDoc}// w w w .j ava 2 s .com * * <p>This takes a ParserRuleContext of a binary operator and "flattens" * the operator if one of its operands is the same binary operator context.</p> */ public void flatten(ParserRuleContext ctx) { /* This function only flattens if the operator is the same and also * keeps the operators intact. * * Since ANTLR4 parses this operator as left associative, we only * need to check the left hand side expr. */ //If the child isn't the same construct, nothing to do. if (!(ctx.getChild(0).getClass() == ctx.getClass())) return; ParserRuleContext lhs = (ParserRuleContext) ctx.getChild(0); ParseTree rhs = ctx.getChild(2); TerminalNode op = (TerminalNode) ctx.getChild(1); /*If the operator of the nested Context isn't the same, nothing to do. *The operator is always in position 1 for infix operators. We do this *check because some Contexts that use the same context for multiple *operators. */ if (!op.getText().equals(lhs.getChild(1).getText())) return; //Clear all children. ctx.children.clear(); //Add all children of lhs. (Also adds the operator of the lhs.) ctx.children.addAll(lhs.children); //Finally, add the rhs back in. ctx.children.add(rhs); }
From source file:PostParser.java
License:Open Source License
/** * {@inheritDoc}/* ww w .j a va2 s .c o m*/ * * <p>And[expr1,expr2]</p> */ @Override public void exitAnd(FoxySheepParser.AndContext ctx) { //The usual flatten function won't work, because there are two And operators, //and we need to flatten over both. //If the child isn't the same construct, nothing to do. if (!(ctx.getChild(0).getClass() == ctx.getClass())) return; ParserRuleContext lhs = (ParserRuleContext) ctx.getChild(0); ParseTree rhs = ctx.getChild(2); TerminalNode op = (TerminalNode) ctx.getChild(1); /*If the operator of the nested Context isn't the same, nothing to do. *The operator is always in position 1 for infix operators. We do this *check because some Contexts that use the same context for multiple *operators. */ //Here's the part that's different from flatten(). //If childOp is an Nand or parentOp is a Nand, then we need child==parent. String childOp = lhs.getChild(1).getText(); if (childOp.equals("\u22bc") || op.getText().equals("\u22bc")) { if (!op.getText().equals(childOp)) return; } //Clear all children. ctx.children.clear(); //Add all children of lhs. (Also adds the operator of the lhs.) ctx.children.addAll(lhs.children); //Finally, add the rhs back in. ctx.children.add(rhs); }
From source file:PostParser.java
License:Open Source License
/** * {@inheritDoc}// w ww.j a v a 2 s . c om * * <p>Or[expr1,expr2]</p> */ @Override public void exitOr(FoxySheepParser.OrContext ctx) { //The usual flatten function won't work, because there are two Or operators, //and we need to flatten over both. //If the child isn't the same construct, nothing to do. if (!(ctx.getChild(0).getClass() == ctx.getClass())) return; ParserRuleContext lhs = (ParserRuleContext) ctx.getChild(0); ParseTree rhs = ctx.getChild(2); TerminalNode op = (TerminalNode) ctx.getChild(1); /*If the operator of the nested Context isn't the same, nothing to do. *The operator is always in position 1 for infix operators. We do this *check because some Contexts that use the same context for multiple *operators. */ //Here's the part that's different from flatten(). //If childOp is an Nor or parentOp is a Nor, then we need child==parent. String childOp = lhs.getChild(1).getText(); if (childOp.equals("\u22bd") || op.getText().equals("\u22bd")) { if (!op.getText().equals(childOp)) return; } //Clear all children. ctx.children.clear(); //Add all children of lhs. (Also adds the operator of the lhs.) ctx.children.addAll(lhs.children); //Finally, add the rhs back in. ctx.children.add(rhs); }
From source file:FullFormEmitter.java
License:Open Source License
/** * {@inheritDoc}//from w w w . j a va2s. c o m * * <p>This is code factored out of both visitSpanA and visitSpanB.</p> */ public String visitSpan(ParserRuleContext ctx) { StringBuilder val = new StringBuilder("Span["); int curChild = 0; //Because this SpanA might have been created by a subtree rewrite, we //cannot guarantee it begins with an expr. if (ctx.getChild(curChild).getText().equals(";;")) { //Begins with ";;", implicit start of 1. val.append("1"); curChild++; } else { //Begins with expr val.append(getFullForm(ctx.getChild(curChild))); curChild += 2; } //Cursor now points to one past the first ";;" if (curChild < ctx.children.size() && !ctx.getChild(curChild).getText().equals(";;")) { //The middle expr has not been omitted val.append(","); val.append(getFullForm(ctx.getChild(curChild))); curChild++; } else { //The middle expr has been omitted. val.append(",All"); } //Cursor now points to either the second ";;" or past the end of the expr. if (curChild < ctx.children.size() && ctx.getChild(curChild).getText().equals(";;")) { //There is a skip amount. val.append(","); val.append(getFullForm(ctx.getChild(curChild + 1))); } val.append("]"); return val.toString(); }
From source file:br.edu.ifrn.potigol.editor.PrettyListener.java
License:Open Source License
@Override public void exitEveryRule(ParserRuleContext ctx) { if (getValue(ctx) == null) setValue(ctx, getValue(ctx.getChild(0))); }
From source file:com.bacoder.parser.java.adapter.JavaAdapter.java
License:Apache License
protected void setAnnotations(ParserRuleContext context, final NodeWithModifiers node) { List<Annotation> annotations = transform(context, ClassOrInterfaceModifierContext.class, new Function<ClassOrInterfaceModifierContext, Annotation>() { @Override/* w ww.j a v a 2s. c o m*/ public Annotation apply(ClassOrInterfaceModifierContext context) { if (context.getChildCount() > 0 && context.getChild(0) instanceof AnnotationContext) { AnnotationContext annotationContext = (AnnotationContext) context.getChild(0); return getAdapter(AnnotationAdapter.class).adapt(annotationContext); } else { return null; } } }); node.setAnnotations(annotations); }
From source file:com.bacoder.parser.java.adapter.JavaAdapter.java
License:Apache License
protected void setClassOrInterfaceModifiers(ParserRuleContext context, final NodeWithModifiers node) { setAnnotations(context, node);//from w ww.j a v a 2 s. c o m forEachChild(context, ClassOrInterfaceModifierContext.class, new Function<ClassOrInterfaceModifierContext, Void>() { @Override public Void apply(ClassOrInterfaceModifierContext context) { if (context.getChildCount() > 0 && context.getChild(0) instanceof TerminalNode) { TerminalNode child = (TerminalNode) context.getChild(0); int type = child.getSymbol().getType(); switch (type) { case JavaParser.PUBLIC: node.setPublic(true); break; case JavaParser.PROTECTED: node.setProtected(true); break; case JavaParser.PRIVATE: node.setPrivate(true); break; case JavaParser.STATIC: node.setStatic(true); break; case JavaParser.ABSTRACT: node.setAbstract(true); break; case JavaParser.FINAL: node.setFinal(true); break; case JavaParser.STRICTFP: node.setStrictfp(true); break; default: } } return null; } }); }
From source file:com.bacoder.parser.java.adapter.JavaAdapter.java
License:Apache License
protected void setModifiers(ParserRuleContext context, final NodeWithModifiers node) { setClassOrInterfaceModifiers(context, node); forEachChild(context, ModifierContext.class, new Function<ModifierContext, Void>() { @Override// ww w. j av a 2 s . com public Void apply(ModifierContext context) { if (context.getChildCount() > 0 && context.getChild(0) instanceof TerminalNode) { TerminalNode child = (TerminalNode) context.getChild(0); int type = child.getSymbol().getType(); switch (type) { case JavaParser.NATIVE: node.setNative(true); break; case JavaParser.SYNCHRONIZED: node.setSynchronized(true); break; case JavaParser.TRANSIENT: node.setTransient(true); break; case JavaParser.VOLATILE: node.setVolatile(true); break; default: } } return null; } }); }
From source file:com.blazebit.persistence.parser.expression.JPQLSelectExpressionVisitorImpl.java
License:Apache License
public Expression visitMacroExpression(String macroName, ParserRuleContext ctx) { List<Expression> funcArgs = new ArrayList<Expression>(ctx.getChildCount()); // Special handling of empty invocation, the position 2 contains an empty child node if (ctx.getChildCount() != 4 || !ctx.getChild(2).getText().isEmpty()) { for (int i = 0; i < ctx.getChildCount(); i++) { if (!(ctx.getChild(i) instanceof TerminalNode)) { funcArgs.add(ctx.getChild(i).accept(this)); }//from w w w.j a v a 2 s .co m } } MacroFunction macro = macros.get(macroName); if (macro == null) { throw new SyntaxErrorException("The macro '" + macroName + "' could not be found in the macro map!"); } if (usedMacros != null) { usedMacros.add(macroName); } try { return macro.apply(funcArgs); } catch (RuntimeException ex) { throw new IllegalArgumentException("Could not apply the macro for the expression: " + ctx.getText(), ex); } }
From source file:com.gigaspaces.persistency.parser.SQL2MongoBaseVisitor.java
License:Open Source License
private boolean IsLogic(ParserRuleContext ctx, String text) { for (int i = 0; i < ctx.getChildCount(); i++) { ParseTree c = ctx.getChild(i); if (c.getText().equals(text)) return true; }//w w w. j a va 2 s . c om return false; }