improving the string according to kasper

lib/parser/basic_types.rb

@@ -10,6 +10,9 @@ module Parser
     rule(:space?) { space.maybe }
     rule(:newline){ str("\n") >> space?}
     
+    rule(:quote)      { str('"') }
+    rule(:nonquote)   { str('"').absent? >> any }
+
     rule(:comment){ match('#') >> (newline.absent? >> any).repeat.as(:comment) >> newline }
 
     rule(:eol) { newline  | any.absent? }
@@ -30,15 +33,22 @@ module Parser
     # identifier must start with lower case
     rule(:name)   { (match['a-z'] >> match['a-zA-Z0-9'].repeat).as(:name)  >> space? }
     
-    rule(:string_special) { match['\0\t\n\r"\\\\'] }
+    rule(:escape)     { str('\\') >> any.as(:esc) }
-    rule(:escaped_special) { str("\\") >> match['0tnr"\\\\'] }
+    rule(:string)     { quote >> (
+        escape | 
+        nonquote.as(:char)
+      ).repeat(1).as(:string) >> quote }
+    
+    
+#    rule(:string_special) { match['\0\t\n\r"\\\\'] }
+#    rule(:escaped_special) { str("\\") >> match['0tnr"\\\\'] }
     
     #anything in double quotes
-    rule(:string){
+#    rule(:string){
-      double_quote >> 
+#      double_quote >> 
-      ( escaped_special | string_special.absent? >> any ).repeat.as(:string) >> 
+#      ( escaped_special | string_special.absent? >> any ).repeat.as(:string) >> 
-      double_quote >> space?
+#      double_quote >> space?
-    }
+#    }
     rule(:integer)    { sign.maybe >> digit.repeat(1).as(:integer) >> space? }
     
     rule(:float) { integer >>  dot >> integer >> 

lib/parser/transform.rb

@@ -3,9 +3,12 @@ require 'ast/expression'
 
 module Parser
   class Transform < Parslet::Transform
+    rule(:string => sequence(:chars)) { Ast::StringExpression.new chars.join }
+    rule(:esc => simple(:esc)) { '\\' +  esc }
+    rule(char: simple(:char)) { char }
+    
     rule(:integer => simple(:value)) { Ast::IntegerExpression.new(value.to_i) }
     rule(:name   => simple(:name))  { Ast::NameExpression.new(name.to_s) }
-    rule(:string   => simple(:string))  { Ast::StringExpression.new(string.to_s) }
 
     rule(:argument  => simple(:argument))    { argument  }
     rule(:argument_list => sequence(:argument_list)) { argument_list }

test/parser/test_basic.rb

@@ -29,19 +29,16 @@ class TestBasic < MiniTest::Test
 
   def test_string
     @string_input    = "\"hello\""
-    @parse_output =  {:string=>"hello"}
+    @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}]}
     @transform_output =  Ast::StringExpression.new('hello')
     @parser = @parser.string
   end
 
   def test_string_escapes
-    out = "hello  nyou"
+    out = 'hello  \nyou'
-    out[6] = '\\'
+    @string_input    = '"' + out + '"'
-    @string_input    = "\"#{out}\""
+    @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}, 
-    # puts will show that this is a string with a \n in it. 
+      {:char=>" "}, {:char=>" "}, {:esc=>"n"}, {:char=>"y"}, {:char=>"o"}, {:char=>"u"}]}
-    # but he who knows the ruby string rules well enough to do this in the input may win a beer at the ...
-    # puts @string_input
-    @parse_output =  {:string=>out} #chop quotes off
     @transform_output =  Ast::StringExpression.new(out)
     @parser = @parser.string
   end

test/parser/test_function_call.rb

@@ -24,7 +24,8 @@ class TestFunctionCall < MiniTest::Test
   def test_function_call_string
     @string_input    = 'puts( "hello")'
     @parse_output = {:function_call => {:name => 'puts' },
-                      :argument_list    => [{:argument => {:string => 'hello'}}]}
+                      :argument_list    => [{:argument => 
+                        {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}]}}]}
     @transform_output = Ast::FuncallExpression.new "puts", [Ast::StringExpression.new("hello")]
     @parser = @parser.function_call
   end

test/test_runner.rb

@@ -20,7 +20,7 @@ class TestRunner < MiniTest::Test
   def execute file
     string = File.read(file)
     parser = Parser::Composed.new
-    syntax    = parser.function_definition.parse_with_debug(string)
+    syntax    = parser.parse_with_debug(string)
     program = Vm::Program.new "Arm"
     main      = Parser::Transform.new.apply(syntax)