Add NewPerser support

lib/lrama/command.rb

@@ -8,7 +8,7 @@ def run(argv)
       warning = Lrama::Warning.new
       text = options.y.read
       options.y.close if options.y != STDIN
-      grammar = Lrama::NewParser.new(text).parse
+      grammar = Lrama::NewParser.new(text, options.header_file).parse
       states = Lrama::States.new(grammar, warning, trace_state: (options.trace_opts[:automaton] || options.trace_opts[:closure]))
       states.compute
       context = Lrama::Context.new(states)

parser.y

@@ -5,7 +5,7 @@ rule
   prologue_declarations: # empty
                        | prologue_declarations prologue_declaration
 
-  prologue_declaration: "%{" {@lexer.status = :c_declaration; @lexer.end_symbol = '%}'; @grammar.prologue_first_lineno = @lexer.line} C_DECLARATION {@lexer.status = :initial; @lexer.end_symbol = nil} "%}" { @grammar.prologue = val[2] }
+  prologue_declaration: "%{" {@lexer.status = :c_declaration; @lexer.end_symbol = '%}'; @grammar.prologue_first_lineno = @lexer.line} C_DECLARATION {@lexer.status = :initial; @lexer.end_symbol = nil} "%}" { @grammar.prologue = prologue(val[2]) }
                       | "%require" STRING
 
   bison_declarations: /* empty */ { result = "" }
@@ -119,8 +119,9 @@ end
 
 ---- inner
 
-def initialize(text)
+def initialize(text, header_file)
   @text = text
+  @header_path = header_file ? header_file.sub("./", "") : nil
   @lineno = []
   @column = []
 end
@@ -150,3 +151,11 @@ def build_token(type:, s_value:, line:, column:, alias_name: nil)
 
   token
 end
+
+def prologue(s_value)
+  if @header_path
+    "\n#include \"#{@header_path}\"\n" + s_value
+  else
+    s_value
+  end
+end