mirror of
https://github.com/jashkenas/coffeescript.git
synced 2026-02-17 19:11:22 -05:00
first little piece of the rewriter
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@@ -1,4 +1,5 @@
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sys: require 'sys'
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Rewriter: require('./rewriter').Rewriter
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# The lexer reads a stream of CoffeeScript and divvys it up into tagged
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# tokens. A minor bit of the ambiguity in the grammar has been avoided by
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@@ -70,8 +71,7 @@ lex::tokenize: (code) ->
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this.extract_next_token()
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# sys.puts "original stream: " + this.tokens if process.ENV['VERBOSE']
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this.close_indentation()
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# (new Rewriter()).rewrite(this.tokens)
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this.tokens
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(new Rewriter()).rewrite this.tokens
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# At every position, run through this list of attempted matches,
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# short-circuiting if any of them succeed.
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@@ -105,12 +105,14 @@ lex::identifier_token: ->
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this.tag(-1, 'PROPERTY_ACCESS')
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this.token(tag, id)
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this.i += id.length
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true
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# Matches numbers, including decimals, hex, and exponential notation.
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lex::number_token: ->
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return false unless number: this.match NUMBER, 1
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this.token 'NUMBER', number
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this.i += number.length
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true
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# Matches strings, including multi-line strings.
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lex::string_token: ->
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@@ -119,6 +121,7 @@ lex::string_token: ->
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this.token 'STRING', escaped
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this.line += this.count string, "\n"
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this.i += string.length
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true
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# Matches heredocs, adjusting indentation to the correct level.
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lex::heredoc_token: ->
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@@ -131,12 +134,14 @@ lex::heredoc_token: ->
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this.token 'STRING', '"' + doc + '"'
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this.line += this.count match[1], "\n"
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this.i += match[1].length
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true
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# Matches interpolated JavaScript.
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lex::js_token: ->
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return false unless script: this.match JS, 1
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this.token 'JS', script.replace(JS_CLEANER, '')
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this.i += script.length
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true
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# Matches regular expression literals.
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lex::regex_token: ->
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@@ -144,6 +149,7 @@ lex::regex_token: ->
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return false if NOT_REGEX.indexOf(this.tag()) >= 0
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this.token 'REGEX', regex
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this.i += regex.length
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true
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# Matches and conumes comments.
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lex::comment_token: ->
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@@ -152,6 +158,7 @@ lex::comment_token: ->
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this.token 'COMMENT', comment.replace(COMMENT_CLEANER, '').split(MULTILINER)
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this.token "\n", "\n"
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this.i += comment.length
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true
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# Record tokens for indentation differing from the previous line.
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lex::indent_token: ->
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@@ -170,6 +177,7 @@ lex::indent_token: ->
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else
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this.outdent_token this.indent - size
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this.indent: size
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true
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# Record an oudent token or tokens, if we're moving back inwards past
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# multiple recorded indents.
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@@ -179,12 +187,14 @@ lex::outdent_token: (move_out) ->
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this.token 'OUTDENT', last_indent
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move_out -= last_indent
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this.token "\n", "\n"
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true
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# Matches and consumes non-meaningful whitespace.
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lex::whitespace_token: ->
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return false unless space: this.match WHITESPACE, 1
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this.value().spaced: true
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this.i += space.length
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true
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# Multiple newlines get merged together.
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# Use a trailing \ to escape newlines.
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@@ -211,6 +221,7 @@ lex::literal_token: ->
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tag: 'INDEX_START' if value is '['
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this.token tag, value
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this.i += value.length
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true
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# Helpers =============================================================
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