[Contents]

2. Interpreter Architecture

2.4. Syntax Analyzer

2.4.3. Functions implemented in this module

2.4.3.35. ex_Tag

This function implements the syntax analysis for the lowest syntax elements of an expression. This function is called when syntax analysis believes that a TAG has to be worked up in an expression. A tag is defined formally as

 tag ::= UNOP tag
         BUN '(' expression_list ')'
         NUMBER
         STRING
         '(' expression ')'
         VARIABLE { '[' expression_list ']' }
         VARIABLE '{' expression_list '}'
         FUNC '(' expression_list ')'
        .

peNODE ex_Tag(peXobject pEx
  ){