74 lines
1.6 KiB
Ruby
74 lines
1.6 KiB
Ruby
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#!/usr/bin/ruby
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# encoding: utf-8
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require 'antlr3/test/functional'
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class TestRuleTracing < ANTLR3::Test::Functional
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inline_grammar( <<-'END' )
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grammar Traced;
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options {
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language = Ruby;
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}
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@parser::init {
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@stack = nil
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@traces = []
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}
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@parser::members {
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attr_accessor :stack, :traces
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def trace_in(rule_name, rule_index)
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@traces << ">#{rule_name}"
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end
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def trace_out(rule_name, rule_index)
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@traces << "<#{rule_name}"
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end
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}
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@lexer::init {
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@stack = nil
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@traces = []
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}
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@lexer::members {
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attr_accessor :stack, :traces
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def trace_in(rule_name, rule_index)
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@traces << ">#{rule_name}"
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end
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def trace_out(rule_name, rule_index)
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@traces << "<#{rule_name}"
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end
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}
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a: '<' ((INT '+')=>b|c) '>';
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b: c ('+' c)*;
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c: INT ;
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INT: ('0'..'9')+;
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WS: (' ' | '\n' | '\t')+ {$channel = HIDDEN;};
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END
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compile_options :trace => true
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example "setting up rule tracing" do
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lexer = Traced::Lexer.new( '< 1 + 2 + 3 >' )
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parser = Traced::Parser.new lexer
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parser.a
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lexer.traces.should == [
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'>t__6!', '<t__6!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
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'>t__8!', '<t__8!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
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'>t__8!', '<t__8!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
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'>t__7!', '<t__7!'
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]
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parser.traces.should == [
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'>a', '>synpred1_Traced', '<synpred1_Traced',
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'>b', '>c', '<c', '>c', '<c', '>c', '<c', '<b', '<a'
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]
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end
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end
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