| /* |
| [The "BSD license"] |
| Copyright (c) 2005-2006 Terence Parr |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| 3. The name of the author may not be used to endorse or promote products |
| derived from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /** Template subgroup to add template rewrite output |
| * If debugging, then you'll also get STDbg.stg loaded. |
| */ |
| |
| @outputFile.imports() ::= << |
| <@super.imports()> |
| import org.antlr.stringtemplate.*; |
| import org.antlr.stringtemplate.language.*; |
| import java.util.HashMap; |
| >> |
| |
| /** Add this to each rule's return value struct */ |
| @returnScope.ruleReturnMembers() ::= << |
| public StringTemplate st; |
| public Object getTemplate() { return st; } |
| public String toString() { return st==null?null:st.toString(); } |
| >> |
| |
| @genericParser.members() ::= << |
| <@super.members()> |
| protected StringTemplateGroup templateLib = |
| new StringTemplateGroup("<name>Templates", AngleBracketTemplateLexer.class); |
| |
| public void setTemplateLib(StringTemplateGroup templateLib) { |
| this.templateLib = templateLib; |
| } |
| public StringTemplateGroup getTemplateLib() { |
| return templateLib; |
| } |
| /** allows convenient multi-value initialization: |
| * "new STAttrMap().put(...).put(...)" |
| */ |
| public static class STAttrMap extends HashMap { |
| public STAttrMap put(String attrName, Object value) { |
| super.put(attrName, value); |
| return this; |
| } |
| public STAttrMap put(String attrName, int value) { |
| super.put(attrName, new Integer(value)); |
| return this; |
| } |
| } |
| >> |
| |
| /** x+=rule when output=template */ |
| ruleRefAndListLabel(rule,label,elementIndex,args,scope) ::= << |
| <ruleRef(rule,label,elementIndex,args,scope)> |
| <listLabel(label, {<label>.getTemplate()})> |
| >> |
| |
| rewriteTemplate(alts) ::= << |
| |
| // TEMPLATE REWRITE |
| <if(backtracking)> |
| if ( <actions.(actionScope).synpredgate> ) { |
| <alts:rewriteTemplateAlt(); separator="else "> |
| <if(rewriteMode)><replaceTextInLine()><endif> |
| } |
| <else> |
| <alts:rewriteTemplateAlt(); separator="else "> |
| <if(rewriteMode)><replaceTextInLine()><endif> |
| <endif> |
| >> |
| |
| replaceTextInLine() ::= << |
| <if(TREE_PARSER)> |
| ((TokenRewriteStream)input.getTokenStream()).replace( |
| input.getTreeAdaptor().getTokenStartIndex(retval.start), |
| input.getTreeAdaptor().getTokenStopIndex(retval.start), |
| retval.st); |
| <else> |
| ((TokenRewriteStream)input).replace( |
| ((Token)retval.start).getTokenIndex(), |
| input.LT(-1).getTokenIndex(), |
| retval.st); |
| <endif> |
| >> |
| |
| rewriteTemplateAlt(alt) ::= << |
| // <alt.description> |
| <if(alt.pred)> |
| if (<alt.pred>) { |
| retval.st = <alt.alt>; |
| }<\n> |
| <else> |
| { |
| retval.st = <alt.alt>; |
| }<\n> |
| <endif> |
| >> |
| |
| rewriteEmptyTemplate(alts) ::= << |
| null; |
| >> |
| |
| /** Invoke a template with a set of attribute name/value pairs. |
| * Set the value of the rule's template *after* having set |
| * the attributes because the rule's template might be used as |
| * an attribute to build a bigger template; you get a self-embedded |
| * template. |
| */ |
| rewriteExternalTemplate(name,args) ::= <% |
| templateLib.getInstanceOf("<name>"<if(args)>, |
| new STAttrMap()<args:{a | .put("<a.name>", <a.value>)}> |
| <endif>) |
| %> |
| |
| /** expr is a string expression that says what template to load */ |
| rewriteIndirectTemplate(expr,args) ::= <% |
| templateLib.getInstanceOf(<expr><if(args)>, |
| new STAttrMap()<args:{a | .put("<a.name>", <a.value>)}> |
| <endif>) |
| %> |
| |
| /** Invoke an inline template with a set of attribute name/value pairs */ |
| rewriteInlineTemplate(args, template) ::= <% |
| new StringTemplate(templateLib, "<template>"<if(args)>, |
| new STAttrMap()<args:{a | .put("<a.name>", <a.value>)}> |
| <endif>) |
| %> |
| |
| /** plain -> {foo} action */ |
| rewriteAction(action) ::= << |
| <action> |
| >> |
| |
| /** An action has %st.attrName=expr; or %{st}.attrName=expr; */ |
| actionSetAttribute(st,attrName,expr) ::= << |
| (<st>).setAttribute("<attrName>",<expr>); |
| >> |
| |
| /** Translate %{stringExpr} */ |
| actionStringConstructor(stringExpr) ::= << |
| new StringTemplate(templateLib,<stringExpr>) |
| >> |
