Class: EsiAttributeLanguageibute::Parser
- Inherits:
-
Racc::Parser
- Object
- Racc::Parser
- EsiAttributeLanguageibute::Parser
- Defined in:
- lib/esi_attribute_language/grammar/lexer.rb,
lib/esi_attribute_language/grammar/parser.rb
Defined Under Namespace
Classes: ScanError
Constant Summary collapse
- Racc_arg =
[ racc_action_table, racc_action_check, racc_action_default, racc_action_pointer, racc_goto_table, racc_goto_check, racc_goto_default, racc_goto_pointer, racc_nt_base, racc_reduce_table, racc_token_table, racc_shift_n, racc_reduce_n, racc_use_result_var ]
- Racc_token_to_s_table =
[ "$end", "error", "DOLLAR", "LSQUARE", "RSQUARE", "LPAREN", "RPAREN", "LBRACE", "RBRACE", "BSLASH", "PIPE", "PLUS", "NUMBER", "$start", "varaible", "expression" ]
- Racc_debug_parser =
false
Instance Attribute Summary collapse
-
#filename ⇒ Object
readonly
Returns the value of attribute filename.
-
#lineno ⇒ Object
readonly
Returns the value of attribute lineno.
Instance Method Summary collapse
- #_reduce_none(val, _values, result) ⇒ Object
- #action(&block) ⇒ Object
- #load_file(filename) ⇒ Object
- #next_token ⇒ Object
- #scan_evaluate(str) ⇒ Object
- #scan_file(filename) ⇒ Object
- #scan_setup ⇒ Object
- #scan_str(str) ⇒ Object
Instance Attribute Details
#filename ⇒ Object (readonly)
Returns the value of attribute filename.
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 14 def filename @filename end |
#lineno ⇒ Object (readonly)
Returns the value of attribute lineno.
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 13 def lineno @lineno end |
Instance Method Details
#_reduce_none(val, _values, result) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/parser.rb', line 143 def _reduce_none(val, _values, result) val[0] end |
#action(&block) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 18 def action &block yield end |
#load_file(filename) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 27 def load_file( filename ) @filename = filename open(filename, "r") do |f| scan_evaluate f.read end end |
#next_token ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 39 def next_token @rex_tokens.shift end |
#scan_evaluate(str) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 43 def scan_evaluate( str ) scan_setup @rex_tokens = [] @lineno = 1 ss = StringScanner.new(str) state = nil until ss.eos? text = ss.peek(1) @lineno += 1 if text == "\n" case state when nil case when (text = ss.scan(/\$/)) @rex_tokens.push action { [:DOLLAR, text] } when (text = ss.scan(/\|/)) @rex_tokens.push action { [:PIPE, text] } when (text = ss.scan(/\[/)) @rex_tokens.push action { [:LSQUARE, text] } when (text = ss.scan(/\]/)) @rex_tokens.push action { [:RSQUARE, text] } when (text = ss.scan(/\{/)) @rex_tokens.push action { [:LBRACE, text] } when (text = ss.scan(/\}/)) @rex_tokens.push action { [:RBRACE, text] } when (text = ss.scan(/\(/)) @rex_tokens.push action { [:LPAREN, text] } when (text = ss.scan(/\)/)) @rex_tokens.push action { [:RPAREN, text] } when (text = ss.scan(/\\/)) @rex_tokens.push action { [:BSLASH, text] } when (text = ss.scan(/\+/)) @rex_tokens.push action { [:PLUS, text] } when (text = ss.scan(/\*/)) @rex_tokens.push action { [:STAR, text] } when (text = ss.scan(/\?/)) @rex_tokens.push action { [:QMARK, text] } when (text = ss.scan(/\./)) @rex_tokens.push action { [:DOT, text] } when (text = ss.scan(/\^/)) @rex_tokens.push action { [:CARROT, text] } when (text = ss.scan(/-/)) @rex_tokens.push action { [:MINUS, text] } when (text = ss.scan(/&/)) @rex_tokens.push action { [:AMP, text] } when (text = ss.scan(/!/)) @rex_tokens.push action { [:BANG, text] } when (text = ss.scan(/./)) @rex_tokens.push action { [:CHAR, text] } else text = ss.string[ss.pos .. -1] raise ScanError, "can not match: '" + text + "'" end # if else raise ScanError, "undefined state: '" + state.to_s + "'" end # case state end # until ss end |
#scan_file(filename) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 34 def scan_file( filename ) load_file filename do_parse end |
#scan_setup ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 16 def scan_setup ; end |
#scan_str(str) ⇒ Object
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# File 'lib/esi_attribute_language/grammar/lexer.rb', line 22 def scan_str( str ) scan_evaluate str do_parse end |