46 lines
1.6 KiB
Ruby
46 lines
1.6 KiB
Ruby
require 'strscan'
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require 'sass/script/node'
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require 'sass/script/variable'
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require 'sass/script/funcall'
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require 'sass/script/operation'
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require 'sass/script/literal'
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require 'sass/script/parser'
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module Sass
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# SassScript is code that's embedded in Sass documents
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# to allow for property values to be computed from variables.
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#
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# This module contains code that handles the parsing and evaluation of SassScript.
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module Script
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# The character that begins a variable.
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# @private
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VARIABLE_CHAR = ?!
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# The regular expression used to parse variables.
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# @private
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MATCH = /^!([a-zA-Z_-][\w-]*)\s*((?:\|\|)?=)\s*(.+)/
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# The regular expression used to validate variables without matching.
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# @private
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VALIDATE = /^![a-zA-Z_-][\w-]*$/
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# Parses a string of SassScript
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#
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# @param value [String] The SassScript
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# @param line [Fixnum] The number of the line on which the SassScript appeared.
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# Used for error reporting
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# @param offset [Fixnum] The number of characters in on `line` that the SassScript started.
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# Used for error reporting
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# @param options [{Symbol => Object}] An options hash;
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# see {file:SASS_REFERENCE.md#sass_options the Sass options documentation}
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# @return [Script::Node] The root node of the parse tree
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def self.parse(value, line, offset, options = {})
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Parser.parse(value, line, offset, options)
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rescue Sass::SyntaxError => e
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e.message << ": #{value.inspect}." if e.message == "SassScript error"
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e.modify_backtrace(:line => line, :filename => options[:filename])
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raise e
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end
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end
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end
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