//throws RecognitionException
public Object expr(AST _t)
{
Object value=null;
antlr.stringtemplate.language.StringTemplateAST expr_AST_in = (antlr.stringtemplate.language.StringTemplateAST)_t;
Object a=null, b=null, e=null;
IDictionary argumentContext=null;
try { // for error handling
if (null == _t)
_t = ASTNULL;
switch ( _t.Type )
{
case PLUS:
{
AST __t3 = _t;
antlr.stringtemplate.language.StringTemplateAST tmp1_AST_in = (_t==ASTNULL) ? null : (antlr.stringtemplate.language.StringTemplateAST)_t;
match((AST)_t,PLUS);
_t = _t.getFirstChild();
a=expr(_t);
_t = retTree_;
b=expr(_t);
_t = retTree_;
value = chunk.add(a,b);
_t = __t3;
_t = _t.getNextSibling();
break;
}
case APPLY:
case MULTI_APPLY:
{
value=templateApplication(_t);
_t = retTree_;
break;
}
case DOT:
case ID:
case ANONYMOUS_TEMPLATE:
case STRING:
case INT:
{
value=attribute(_t);
_t = retTree_;
break;
}
case INCLUDE:
{
value=templateInclude(_t);
_t = retTree_;
break;
}
case FUNCTION:
{
value=function(_t);
_t = retTree_;
break;
}
case LIST:
{
value=list(_t);
_t = retTree_;
break;
}
case VALUE:
{
AST __t4 = _t;
antlr.stringtemplate.language.StringTemplateAST tmp2_AST_in = (_t==ASTNULL) ? null : (antlr.stringtemplate.language.StringTemplateAST)_t;
match((AST)_t,VALUE);
_t = _t.getFirstChild();
e=expr(_t);
_t = retTree_;
_t = __t4;
_t = _t.getNextSibling();
StringWriter buf = new StringWriter();
Type writerClass = @out.GetType();
StringTemplateWriter sw = null;
try {
ConstructorInfo ctor =
writerClass.GetConstructor(new Type[] {typeof(TextWriter)});
sw = (StringTemplateWriter)ctor.Invoke(new Object[] {buf});
}
catch (Exception exc) {
// default new AutoIndentWriter(buf)
self.error("cannot make implementation of StringTemplateWriter",exc);
sw = new AutoIndentWriter(buf);
}
chunk.writeAttribute(self,e,sw);
value = buf.ToString();
break;
}
default:
{
throw new NoViableAltException(_t);
}
}
}
catch (RecognitionException ex)
{
reportError(ex);
if (null != _t)
{
_t = _t.getNextSibling();
}
}
retTree_ = _t;
return value;
}
/// <summary>A separator is normally just a string literal, but is still an AST that
/// we must evaluate. The separator can be any expression such as a template
/// include or string cat expression etc...
/// </summary>
protected internal virtual String computeSeparator(StringTemplate self, StringTemplateWriter outWriter, Object separator)
{
if (separator == null)
{
return null;
}
if (separator is StringTemplateAST)
{
StringTemplateAST separatorTree = (StringTemplateAST) separator;
// must evaluate, writing to a string so we can hand on to it
ASTExpr e = new ASTExpr(getEnclosingTemplate(), separatorTree, null);
System.IO.StringWriter buf = new System.IO.StringWriter();
// create a new instance of whatever StringTemplateWriter
// implementation they are using. Default is AutoIndentWriter.
// Defalut behavior is to indent but without
// any prior indents surrounding this attribute expression
StringTemplateWriter sw = null;
System.Type writerClass = outWriter.GetType();
try
{
System.Reflection.ConstructorInfo ctor = writerClass.GetConstructor(new System.Type[]{typeof(System.IO.TextWriter)});
sw = (StringTemplateWriter) ctor.Invoke(new Object[]{buf});
}
catch (System.Exception exc)
{
// default new AutoIndentWriter(buf)
self.error("cannot make implementation of StringTemplateWriter", exc);
sw = new AutoIndentWriter(buf);
}
try
{
e.write(self, sw);
}
catch (System.IO.IOException ioe)
{
self.error("can't evaluate separator expression", ioe);
}
return buf.ToString();
}
else
{
// just in case we expand in the future and it's something else
return separator.ToString();
}
}
/// <summary>return an instance of a StringTemplateWriter that spits output to w.
/// If a writer is specified, use it instead of the default.
/// </summary>
public virtual StringTemplateWriter getStringTemplateWriter(System.IO.TextWriter w)
{
StringTemplateWriter stw = null;
if (userSpecifiedWriter != null)
{
try
{
System.Reflection.ConstructorInfo ctor = userSpecifiedWriter.GetConstructor(new System.Type[]{typeof(System.IO.TextWriter)});
stw = (StringTemplateWriter) ctor.Invoke(new Object[]{w});
}
catch (System.Exception e)
{
error("problems getting StringTemplateWriter", e);
}
}
if (stw == null)
{
stw = new AutoIndentWriter(w);
}
return stw;
}
