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require "erb"
require "forwardable"
require "lrama/report"
module Lrama
class Output
extend Forwardable
include Report::Duration
attr_reader :grammar_file_path, :context, :grammar
def_delegators "@context", :yyfinal, :yylast, :yyntokens, :yynnts, :yynrules, :yynstates,
:yymaxutok, :yypact_ninf, :yytable_ninf
def_delegators "@grammar", :eof_symbol, :error_symbol, :undef_symbol, :accept_symbol
def initialize(out:, output_file_path:, template_name:, grammar_file_path:, header_out: nil, header_file_path: nil, context:, grammar:)
@out = out
@output_file_path = output_file_path
@template_name = template_name
@grammar_file_path = grammar_file_path
@header_out = header_out
@header_file_path = header_file_path
@context = context
@grammar = grammar
end
if ERB.instance_method(:initialize).parameters.last.first == :key
def self.erb(input)
ERB.new(input, trim_mode: '-')
end
else
def self.erb(input)
ERB.new(input, nil, '-')
end
end
def eval_template(file, path)
erb = self.class.erb(File.read(file))
erb.filename = file
tmp = erb.result_with_hash(context: @context, output: self)
replace_special_variables(tmp, path)
end
def render
report_duration(:render) do
tmp = eval_template(template_file, @output_file_path)
@out << tmp
if @header_file_path
tmp = eval_template(header_template_file, @header_file_path)
if @header_out
@header_out << tmp
else
File.open(@header_file_path, "w+") do |f|
f << tmp
end
end
end
end
end
# A part of b4_token_enums
def token_enums
str = ""
@context.yytokentype.each do |s_value, token_id, display_name|
s = sprintf("%s = %d%s", s_value, token_id, token_id == yymaxutok ? "" : ",")
if display_name
str << sprintf(" %-30s /* %s */\n", s, display_name)
else
str << sprintf(" %s\n", s)
end
end
str
end
# b4_symbol_enum
def symbol_enum
str = ""
last_sym_number = @context.yysymbol_kind_t.last[1]
@context.yysymbol_kind_t.each do |s_value, sym_number, display_name|
s = sprintf("%s = %d%s", s_value, sym_number, (sym_number == last_sym_number) ? "" : ",")
if display_name
str << sprintf(" %-40s /* %s */\n", s, display_name)
else
str << sprintf(" %s\n", s)
end
end
str
end
def yytranslate
int_array_to_string(@context.yytranslate)
end
def yyrline
int_array_to_string(@context.yyrline)
end
def yytname
string_array_to_string(@context.yytname) + " YY_NULLPTR"
end
# b4_int_type_for
def int_type_for(ary)
min = ary.min
max = ary.max
case
when (-127 <= min && min <= 127) && (-127 <= max && max <= 127)
"yytype_int8"
when (0 <= min && min <= 255) && (0 <= max && max <= 255)
"yytype_uint8"
when (-32767 <= min && min <= 32767) && (-32767 <= max && max <= 32767)
"yytype_int16"
when (0 <= min && min <= 65535) && (0 <= max && max <= 65535)
"yytype_uint16"
else
"int"
end
end
def symbol_actions_for_printer
str = ""
@grammar.symbols.each do |sym|
next unless sym.printer
str << <<-STR
case #{sym.enum_name}: /* #{sym.comment} */
#line #{sym.printer.lineno} "#{@grammar_file_path}"
#{sym.printer.translated_code(sym.tag)}
#line [@oline@] [@ofile@]
break;
STR
end
str
end
# b4_user_initial_action
def user_initial_action(comment = "")
return "" unless @grammar.initial_action
<<-STR
#{comment}
#line #{@grammar.initial_action.line} "#{@grammar_file_path}"
#{@grammar.initial_action.translated_code}
STR
end
# b4_user_actions
def user_actions
str = ""
@context.states.rules.each do |rule|
next unless rule.code
rule = rule
code = rule.code
spaces = " " * (code.column - 1)
str << <<-STR
case #{rule.id + 1}: /* #{rule.as_comment} */
#line #{code.line} "#{@grammar_file_path}"
#{spaces}#{rule.translated_code}
#line [@oline@] [@ofile@]
break;
STR
end
str << <<-STR
#line [@oline@] [@ofile@]
STR
str
end
def omit_braces_and_blanks(param)
param[1..-2].strip
end
# b4_parse_param
def parse_param
if @grammar.parse_param
omit_braces_and_blanks(@grammar.parse_param)
else
""
end
end
def lex_param
if @grammar.lex_param
omit_braces_and_blanks(@grammar.lex_param)
else
""
end
end
# b4_user_formals
def user_formals
if @grammar.parse_param
", #{parse_param}"
else
""
end
end
# b4_user_args
def user_args
if @grammar.parse_param
", #{parse_param_name}"
else
""
end
end
def extract_param_name(param)
/\A(.)+([a-zA-Z0-9_]+)\z/.match(param)[2]
end
def parse_param_name
if @grammar.parse_param
extract_param_name(parse_param)
else
""
end
end
def lex_param_name
if @grammar.lex_param
extract_param_name(lex_param)
else
""
end
end
# b4_parse_param_use
def parse_param_use(val, loc)
str = <<-STR
YY_USE (#{val});
YY_USE (#{loc});
STR
if @grammar.parse_param
str << " YY_USE (#{parse_param_name});"
end
str
end
# b4_yylex_formals
def yylex_formals
ary = ["&yylval", "&yylloc"]
if @grammar.lex_param
ary << lex_param_name
end
"(#{ary.join(', ')})"
end
# b4_table_value_equals
def table_value_equals(table, value, literal, symbol)
if literal < table.min || table.max < literal
"0"
else
"((#{value}) == #{symbol})"
end
end
# b4_yyerror_args
def yyerror_args
ary = ["&yylloc"]
if @grammar.parse_param
ary << parse_param_name
end
"#{ary.join(', ')}"
end
def template_basename
File.basename(template_file)
end
def aux
@grammar.aux
end
def int_array_to_string(ary)
last = ary.count - 1
s = ary.each_with_index.each_slice(10).map do |slice|
str = " "
slice.each do |e, i|
str << sprintf("%6d%s", e, (i == last) ? "" : ",")
end
str
end
s.join("\n")
end
def spec_mapped_header_file
@header_file_path
end
def b4_cpp_guard__b4_spec_mapped_header_file
if @header_file_path
"YY_YY_" + @header_file_path.gsub(/[^a-zA-Z_0-9]+/, "_").upcase + "_INCLUDED"
else
""
end
end
private
def template_file
File.join(template_dir, @template_name)
end
def header_template_file
File.join(template_dir, "bison/yacc.h")
end
def template_dir
File.expand_path("../../../template", __FILE__)
end
def string_array_to_string(ary)
str = ""
tmp = " "
ary.each do |s|
s = s.gsub('\\', '\\\\\\\\')
s = s.gsub('"', '\\"')
if (tmp + s + " \"\",").length > 75
str << tmp << "\n"
tmp = " \"#{s}\","
else
tmp << " \"#{s}\","
end
end
str << tmp
end
def replace_special_variables(str, ofile)
str.each_line.with_index(1).map do |line, i|
line.gsub!("[@oline@]", (i + 1).to_s)
line.gsub!("[@ofile@]", "\"#{ofile}\"")
line
end.join
end
end
end
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