Blatte::Parser3pm

Usage

  use Blatte::Parser;

  $parser = new Blatte::Parser();

  $perl_expr = $parser->parse(INPUT);

    or

  $parsed_expr = $parser->expr(INPUT);
  if (defined($parsed_expr)) {
    $perl_expr = $parsed_expr->transform();
  }

Overview

A parser for turning written Blatte expressions into their Perl equivalents or into Blatte's syntax-tree representation.

Methods

$parser->parse(INPUT)

Parses the first Blatte expression in INPUT and returns the corresponding Perl string, or undef if an error occurred.

INPUT may be a string or a reference to a string. If it's the latter, then after a successful parse, the parsed expression will be removed from the beginning of the string.

$parser->expr(INPUT)

Like parse(), except the result is not converted to Perl; it's left in Blatte's internal parse-tree format, which uses the Blatte::Syntax family of objects.

$parser->eof(INPUT)

Tests INPUT for end-of-file. Leading whitespace is removed from INPUT with consume_whitespace and, if nothing remains, true is returned, else undef.

Other functions

consume_whitespace(STRING_REF)

Given a reference to a string containing Blatte code, this function modifies the string to remove all leading whitespace, comments, and forget-whitespace operators. It discards any comments from, and applies any forget-whitespace operators to the consumed whitespace and returns the resulting whitespace.

This function is called internally by the parser prior to matching each token of the input.