more basics rolling home

lib/parser/basic.citrus

@@ -11,82 +11,23 @@ grammar BasicTypes
     "#" (/.*/ !linebreak) linebreak
   end
 
-  rule dot '.' end
-
-  ## Lexical syntax
-
-  rule number
-    float | integer
-  end
-
-  rule float
-    (digits '.' digits space*) { to_str.to_f }
-  end
-
-  rule integer
-    (digits space*) { to_str.to_i }
+  rule name_expression
+     (name:([a-z_] [a-zA-Z0-9_]*) space?) { Ast::NameExpression.new(capture(:name).to_str)}
   end
 
   rule digits
-    [0-9]+ ('_' [0-9]+)* # Numbers may contain underscores.
+    [0-9] [0-9]*
   end
 
-  rule lparen '(' space* end
-  rule rparen ')' space* end
-
-
-  # Hierarchical syntax
-
-  rule term
-    additive | factor
+  rule integer_expression
+    (digits space?) { Ast::IntegerExpression.new(to_str.to_i) }
   end
 
-  rule additive
-    (factor operator:('+' | '-') space* term) {
-      capture(:factor).value.send(capture(:operator).to_s, capture(:term).value)
-    }
+  rule instance_variable
+    ('@' ivar:name_expression) { Ast::VariableExpression.new (capture(:ivar).value).name }
   end
 
-  rule factor
-    multiplicative | prefix
+  rule basic_expression
+    name_expression | integer_expression | instance_variable
   end
-
-  rule multiplicative
-    (prefix operator:('*' | '/' | '%') space* factor) {
-      capture(:prefix).value.send(capture(:operator).to_s, capture(:factor).value)
-    }
-  end
-
-  rule prefix
-    prefixed | exponent
-  end
-
-  rule prefixed
-    (operator:('-' | '+' | '~') space* prefix) {
-      s = capture(:operator).to_s
-      s += '@' unless s == '~' # Unary + and - require an @.
-      capture(:prefix).value.send(s)
-    }
-  end
-
-  rule exponent
-    exponential | primary
-  end
-
-  rule exponential
-    (primary operator:'**' space* prefix) {
-      capture(:primary).value.send(capture(:operator).to_s, capture(:prefix).value)
-    }
-  end
-
-  rule primary
-    group | number
-  end
-
-  rule group
-    (lparen term rparen) {
-      capture(:term).value
-    }
-  end
-
 end

lib/parser/keywords.citrus

@@ -35,7 +35,7 @@ grammar Keywords
   end
 
   rule keyword_expression
-    keyword_true | keyword_false | keyword_nil
+    keyword_true | keyword_false | keyword_nil | basic_expression
   end
 
   root  keyword_expression

test/unit/test_basic.rb

@@ -1,9 +1,7 @@
 require_relative "../setup"
 
 class TestBasic < MiniTest::Test
-  # include the magic (setup and parse -> test method translation), see there
-  #include ParserHelper
-
+  #test basics and keyword expressions. Keywords includes BasicTypes
   def setup
     @parser = Keywords
   end
@@ -15,7 +13,7 @@ class TestBasic < MiniTest::Test
   end
 
   def test_true
-    @input    = 'true '
+    @input    = 'true  '
     @output = Ast::TrueExpression.new()
     check
   end
@@ -32,43 +30,41 @@ class TestBasic < MiniTest::Test
     check
   end
 
-  def ttest_number
+  def test_integer
     @input    = '42 '
     @output = Ast::IntegerExpression.new(42)
-    @root = :integer
+    check
   end
 
-  def ttest_name
+  def test_name
     @input    = 'foo '
     @output = Ast::NameExpression.new('foo')
-    @root = :name
+    check
   end
 
-  def ttest_name_underscode_start
+  def test_name_underscode_start
     @input    = '_bar '
     @output = Ast::NameExpression.new('_bar')
-    @root = :name
+    check
   end
 
-  def ttest_name_underscode_middle
+  def test_name_underscode_middle
     @input    = 'foo_bar '
-    @parse_output = {:name => 'foo_bar'}
     @output = Ast::NameExpression.new('foo_bar')
-    @root = :name
+    check
   end
 
-  def ttest_instance_variable
+  def test_instance_variable
     @input    = '@foo_bar '
-    @parse_output = {:instance_variable=>{:name=>"foo_bar"}}
     @output = Ast::VariableExpression.new(:foo_bar)
-    @root = :instance_variable
+    check
   end
 
   def ttest_module_name
     @input    = 'FooBar '
     @parse_output = {:module_name=>"FooBar"}
     @output = Ast::ModuleName.new("FooBar")
-    @root = :module_name
+    check
   end
 
   def ttest_comment
@@ -76,14 +72,14 @@ class TestBasic < MiniTest::Test
     @input    =  out.dup #NEEDS the return, which is what delimits the comment
     @parse_output = out
     @output = @parse_output #dont transform
-    @root = :comment
+    check
   end
 
   def ttest_string
     @input    = "\"hello\""
     @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"}]}
     @output =  Ast::StringExpression.new('hello')
-    @root = :string
+    check
   end
 
   def ttest_string_escapes
@@ -92,7 +88,7 @@ class TestBasic < MiniTest::Test
     @parse_output =  {:string=>[{:char=>"h"}, {:char=>"e"}, {:char=>"l"}, {:char=>"l"}, {:char=>"o"},
       {:char=>" "}, {:char=>" "}, {:esc=>"n"}, {:char=>"y"}, {:char=>"o"}, {:char=>"u"}]}
     @output =  Ast::StringExpression.new(out)
-    @root = :string
+    check
   end
 
 end