/ 
parrot-0.6.1
/ Parrot::Pmc2c::Parser

NAME

Parrot::Pmc2c::Parser - PMC Parser

SYNOPSIS

use Parrot::Pmc2c::Parser;

DESCRIPTION

Parrot::Pmc2c::Parser parses a sudo C syntax into a perl hash that is then dumped.

parse_pmc()

$parsed_pmc_hash = parse_pmc($pmc2cMain, $filename);

Purpose: Parse PMC code and return a hash ref of pmc attributes.

Arguments: List of two arguments:

  • The pmc2cMain object

  • Filename of the pmc to parse.

Return Values: Reference to a Parrot::Pmc2c::PMC object

Comments: Called by dump_pmc().

parse_top_level()

my ($preamble, $pmcname, $flags, $parents, $pmcbody, $post, $chewed_lines)
    = parse_top_level(\$code);

Purpose: Extract a pmc signature from the code ref.

Argument: PMC file contents slurped by parse_pmc().

Return Values: List of seven elements:

  • the code found before the pmc signature;

  • the name of the pmc

  • a hash ref containing the flags associated with the pmc (such as extends and provides).

  • the list of parents this pmc extends

  • the body of the pmc

  • the code found after the pmc body

  • number of newlines in the pmc signature that need to be added to the running total of lines in the file

Comments: Called internally by parse_pmc().

parse_flags()

my ($flags, $parents) = parse_flags($attributes, $pmcname);

Purpose: Extract a pmc signature from the code ref.

Argument: PMC file contents slurped by parse_pmc().

Return Values: List of two elements:

  • a hash ref containing the flags associated with the pmc (such as extends and provides).

  • the list of parents this pmc extends

Comments: Called internally by parse_top_level().

extract_balanced()

($pmcbody, $post) = extract_balanced($code);

Purpose: Remove a balanced {} construct from the beginning of $code. Return it and the remaining code.

Argument: The code ref which was the first argument provided to parse_pmc().

Return Values: List of two elements:

  • String beginning with { and ending with }. In between is found C code where the comments hold strings of Perl comments written in POD.

  • String holding the balance of the code. Same style as first element, but without the braces.

Comments: Called twice within parse_pmc(). Will die with error message Badly balanced if not balanced.

parse_method_attrs()

$attrs = parse_method_attrs($method_attributes);

Purpose: Parse a list of method attributes and return a hash ref of them.

Arguments: String captured from regular expression.

Return Values: Reference to hash of attribute values.

Comments: Called within parse_pmc().