public static LexStateFunc LexParameter(LexerBase lexer)
{
lexer.AcceptAnyChar(" ");
lexer.Ignore();
while (true)
{
if (lexer.HasPrefix("}}"))
{
if(lexer.Width > 0)
{
lexer.Emit(TokenType.Parameter);
}
lexer.AcceptWord("}}");
lexer.Ignore();
return LexText;
}
var c = lexer.Next();
if(c == LexerBase.EOF)
{
throw new TemplateException(string.Format("Unfinished parameter line {0}", lexer.Line));
}
}
}
static Template Parse(string text, Template mainTemplate)
{
var index = 0;
var lexer = new LexerBase(text);
lexer.Run(Lexer.LexText);
var template = Parse(mainTemplate, lexer.Tokens, ref index);
Validate(template);
return template;
}
public static LexStateFunc LexKeyword(LexerBase l)
{
l.AcceptWord("{{");
l.AcceptAnyChar(" ");
l.Ignore();
if(l.Accept("."))
{
return LexModelKey;
}
while (true)
{
var c = l.Next();
if (!char.IsLetterOrDigit(c))
{
l.Backup();
break;
}
}
var token = l.Emit(TokenType.Function);
l.AcceptAnyChar(" (");
l.Ignore();
if(token.Value == "if")
{
// despues de un if viene una función
return LexKeyword;
}
switch(token.Value)
{
case "end":
case "else":
return LexInstruction;
case "include":
return LexParameter;
}
return LexParameters;
}
public static LexStateFunc LexText(LexerBase l)
{
while (true)
{
if(l.HasPrefix("{{"))
{
if(l.Width > 0)
{
l.Emit(TokenType.Text);
}
return LexKeyword;
}
if(l.Next() == LexerBase.EOF)
{
if(l.Width > 0)
{
l.Emit(TokenType.Text);
}
return null;
}
}
}
public static LexStateFunc LexQuotes(LexerBase lexer)
{
while(true)
{
var c = lexer.Next();
switch(c)
{
case '\\':
if(lexer.Peek() == '"')
{
lexer.Next();
}
break;
case '"':
lexer.Emit(TokenType.Parameter);
return LexParameters;
case LexerBase.EOF:
throw new TemplateException(string.Format("Unfinished parameter at line {0}", lexer.Line));
}
}
}
public static LexStateFunc LexParameters(LexerBase lexer)
{
lexer.AcceptAnyChar(" ,");
lexer.Ignore();
while (true)
{
if (lexer.HasPrefix(")"))
{
if(lexer.Width > 0)
{
lexer.Emit(TokenType.Parameter);
}
lexer.AcceptAnyChar(") ");
lexer.AcceptWord("}}");
lexer.Ignore();
return LexText;
}
if (lexer.HasPrefix("}}"))
{
if(lexer.Width > 0)
{
lexer.Emit(TokenType.Parameter);
}
lexer.AcceptWord("}}");
lexer.Ignore();
return LexText;
}
var c = lexer.Next();
switch(c)
{
case '"':
return LexQuotes;
case ' ':
case ',':
lexer.Backup();
if(lexer.Width > 0)
{
lexer.Emit(TokenType.Parameter);
}
lexer.AcceptAnyChar(" ,");
lexer.Ignore();
break;
case LexerBase.EOF:
throw new TemplateException(string.Format("Unfinished parameter at line {0}", lexer.Line));
}
}
}
public static LexStateFunc LexModelKey(LexerBase lexer)
{
while (true)
{
var c = lexer.Next();
// las keys son letras, numeros, corchetes (para indices) y comillas dentro de los indices.
if (c != '.' &&
!char.IsLetterOrDigit(c) &&
c != '[' &&
c != ']' &&
c != '"' &&
c != '\'')
{
lexer.Backup();
break;
}
}
lexer.Emit(TokenType.Parameter);
lexer.AcceptAnyChar(" ");
if(!lexer.AcceptWord("}}"))
{
throw new TemplateException(string.Format("Error after model key line {0}", lexer.Line));
}
lexer.Ignore();
return LexText;
}
public static LexStateFunc LexInstruction(LexerBase lexer)
{
lexer.AcceptAnyChar(" ");
if(!lexer.AcceptWord("}}"))
{
throw new TemplateException(string.Format("Error after model key line {0}", lexer.Line));
}
lexer.Ignore();
return LexText;
}