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/** Templates for building ASTs during normal parsing.
 *
 *  Deal with many combinations.  Dimensions are:
 *  Auto build or rewrite
 *    no label, label, list label  (label/no-label handled together)
 *    child, root
 *    token, set, rule, wildcard
 *
 *  The situation is not too bad as rewrite (->) usage makes ^ and !
 *  invalid. There is no huge explosion of combinations.
 */
group ASTParser;

@rule.setErrorReturnValue() ::= <<
retval.tree = this.adaptor.errorNode(this.input, retval.start, this.input.LT(-1), re);
>>

// TOKEN AST STUFF

/** ID and output=AST */
tokenRef(token,label,elementIndex,terminalOptions) ::= <<

if (  ) {
_tree = ;
this.adaptor.addChild(root_0, _tree);
}
>>

/** ID! and output=AST (same as plain tokenRef) */
tokenRefBang(token,label,elementIndex) ::= ""

/** ID^ and output=AST */
tokenRefRuleRoot(token,label,elementIndex,terminalOptions) ::= <<

if (  ) {
_tree = ;
root_0 = this.adaptor.becomeRoot(_tree, root_0);
}
>>

/** ids+=ID! and output=AST */
tokenRefBangAndListLabel(token,label,elementIndex,terminalOptions) ::= <<


>>

/** label+=TOKEN when output=AST but not rewrite alt */
tokenRefAndListLabel(token,label,elementIndex,terminalOptions) ::= <<


>>

/** Match label+=TOKEN^ when output=AST but not rewrite alt */
tokenRefRuleRootAndListLabel(token,label,terminalOptions,elementIndex) ::= <<


>>

// SET AST

// the match set stuff is interesting in that it uses an argument list
// to pass code to the default matchSet; another possible way to alter
// inherited code.  I don't use the region stuff because I need to pass
// different chunks depending on the operator.  I don't like making
// the template name have the operator as the number of templates gets
// large but this is the most flexible--this is as opposed to having
// the code generator call matchSet then add root code or ruleroot code
// plus list label plus ...  The combinations might require complicated
// rather than just added on code.  Investigate that refactoring when
// I have more time.

matchSet(s,label,terminalOptions,elementIndex,postmatchCode) ::= <<
if (  ) this.adaptor.addChild(root_0, );})>
>>

matchRuleBlockSet(s,label,terminalOptions,elementIndex,postmatchCode,treeLevel="0") ::= <<

>>

matchSetBang(s,label,elementIndex,postmatchCode) ::= ""

// note there is no matchSetTrack because -> rewrites force sets to be
// plain old blocks of alts: (A|B|...|C)

matchSetRuleRoot(s,label,terminalOptions,elementIndex,debug) ::= <<

=input.LT(1);<\n>

if (  ) root_0 = this.adaptor.becomeRoot(, root_0);})>
>>

// RULE REF AST

/** rule when output=AST */
ruleRef(rule,label,elementIndex,args,scope) ::= <<

if (  ) this.adaptor.addChild(root_0, .getTree());
>>

/** rule! is same as normal rule ref */
ruleRefBang(rule,label,elementIndex,args,scope) ::= ""

/** rule^ */
ruleRefRuleRoot(rule,label,elementIndex,args,scope) ::= <<

if (  ) root_0 = this.adaptor.becomeRoot(.getTree(), root_0);
>>

/** x+=rule when output=AST */
ruleRefAndListLabel(rule,label,elementIndex,args,scope) ::= <<


>>

/** x+=rule! when output=AST is a rule ref with list addition */
ruleRefBangAndListLabel(rule,label,elementIndex,args,scope) ::= <<


>>

/** x+=rule^ */
ruleRefRuleRootAndListLabel(rule,label,elementIndex,args,scope) ::= <<


>>

// WILDCARD AST

wildcard(label,elementIndex) ::= <<

if (  ) {
_tree = this.adaptor.create();
this.adaptor.addChild(root_0, _tree);
}
>>

wildcardBang(label,elementIndex) ::= ""

wildcardRuleRoot(label,elementIndex) ::= <<

if (  ) {
_tree = this.adaptor.create();
root_0 = this.adaptor.becomeRoot(_tree, root_0);
}
>>

createNodeFromToken(label,terminalOptions) ::= <<

new () 

this.adaptor.create()

>>

ruleCleanUp() ::= <<

if (  ) {<\n>
retval.tree = this.adaptor.rulePostProcessing(root_0);
this.adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);
}
>>