1/* 2 [The "BSD license"] 3 Copyright (c) 2005-2006 Terence Parr 4 All rights reserved. 5 6 Redistribution and use in source and binary forms, with or without 7 modification, are permitted provided that the following conditions 8 are met: 9 1. Redistributions of source code must retain the above copyright 10 notice, this list of conditions and the following disclaimer. 11 2. Redistributions in binary form must reproduce the above copyright 12 notice, this list of conditions and the following disclaimer in the 13 documentation and/or other materials provided with the distribution. 14 3. The name of the author may not be used to endorse or promote products 15 derived from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27*/ 28/** Template subgroup to add template rewrite output 29 * If debugging, then you'll also get STDbg.stg loaded. 30 */ 31 32@outputFile.imports() ::= << 33<@super.imports()> 34import stringtemplate3 35>> 36 37/** Add this to each rule's return value struct */ 38@returnScope.ruleReturnInit() ::= << 39self.st = None 40>> 41 42@returnScope.ruleReturnMembers() ::= << 43def getTemplate(self): 44 return self.st 45 46def toString(self): 47 if self.st is not None: 48 return self.st.toString() 49 return None 50__str__ = toString 51 52>> 53 54@genericParser.init() ::= << 55<@super.init()> 56self.templateLib = stringtemplate3.StringTemplateGroup( 57 '<name>Templates', lexer='angle-bracket' 58 ) 59 60>> 61 62@genericParser.members() ::= << 63<@super.members()> 64def setTemplateLib(self, templateLib): 65 self.templateLib = templateLib 66 67def getTemplateLib(self): 68 return self.templateLib 69 70>> 71 72/** x+=rule when output=template */ 73ruleRefAndListLabel(rule,label,elementIndex,args,scope) ::= << 74<ruleRef(...)> 75<listLabel(label, {<label>.st})> 76>> 77 78rewriteTemplate(alts) ::= << 79# TEMPLATE REWRITE 80<if(backtracking)> 81if <actions.(actionScope).synpredgate>: 82 <first(alts):rewriteTemplateAltFirst()> 83 <rest(alts):{it | el<rewriteTemplateAlt(it)>}> 84 <if(rewriteMode)><replaceTextInLine()><endif> 85 86<else> 87<first(alts):rewriteTemplateAltFirst()> 88<rest(alts):{it | el<rewriteTemplateAlt(it)>}> 89<if(rewriteMode)><replaceTextInLine()><endif> 90<endif> 91>> 92 93replaceTextInLine() ::= << 94<if(TREE_PARSER)> 95self.input.getTokenStream().replace( 96 self.input.getTreeAdaptor().getTokenStartIndex(retval.start), 97 self.input.getTreeAdaptor().getTokenStopIndex(retval.start), 98 retval.st 99 ) 100<else> 101self.input.replace( 102 retval.start.getTokenIndex(), 103 self.input.LT(-1).getTokenIndex(), 104 retval.st 105 ) 106<endif> 107>> 108 109rewriteTemplateAltFirst(alt) ::= << 110<if(alt.pred)> 111if <alt.pred>: 112 # <alt.description> 113 retval.st = <alt.alt> 114<\n> 115<else> 116# <alt.description> 117retval.st = <alt.alt> 118<\n> 119<endif> 120>> 121 122rewriteTemplateAlt(alt) ::= << 123<if(alt.pred)>if <alt.pred>: 124 # <alt.description> 125 retval.st = <alt.alt> 126<\n> 127<else>se: 128 # <alt.description> 129 retval.st = <alt.alt> 130<\n> 131<endif> 132>> 133 134rewriteEmptyTemplate(alts) ::= << 135None 136>> 137 138/** Invoke a template with a set of attribute name/value pairs. 139 * Set the value of the rule's template *after* having set 140 * the attributes because the rule's template might be used as 141 * an attribute to build a bigger template; you get a self-embedded 142 * template. 143 */ 144rewriteExternalTemplate(name,args) ::= <% 145self.templateLib.getInstanceOf("<name>"<if(args)>, attributes={<args:{a | "<a.name>": <a.value>}; separator=", ">}<endif>) 146%> 147 148/** expr is a string expression that says what template to load */ 149rewriteIndirectTemplate(expr,args) ::= <% 150self.templateLib.getInstanceOf(<expr><if(args)>, attributes={<args:{a | "<a.name>": <a.value>}; separator=", ">}<endif>) 151%> 152 153/** Invoke an inline template with a set of attribute name/value pairs */ 154rewriteInlineTemplate(args, template) ::= <% 155stringtemplate3.StringTemplate("<template>", group=self.templateLib<if(args)>, attributes={<args:{a | "<a.name>": <a.value>}; separator=", ">}<endif>) 156%> 157 158/** plain -> {foo} action */ 159rewriteAction(action) ::= << 160<action> 161>> 162 163/** An action has %st.attrName=expr; or %{st}.attrName=expr; */ 164actionSetAttribute(st,attrName,expr) ::= << 165(<st>)["<attrName>"] = <expr> 166>> 167 168/** Translate %{stringExpr} */ 169actionStringConstructor(stringExpr) ::= << 170stringtemplate3.StringTemplate(<stringExpr>, group=self.templateLib) 171>> 172