Refine parse and AST to represent ConstValue

Replicates graphql/graphql-js@513eacc

Author: Cito

.mypy.ini

@@ -1,5 +1,5 @@
 [mypy]
-python_version = 3.8
+python_version = 3.9
 check_untyped_defs = True
 no_implicit_optional = True
 strict_optional = True

docs/modules/language.rst

@@ -17,6 +17,12 @@ Each kind of AST node has its own class:
 
 .. autoclass:: ArgumentNode
 .. autoclass:: BooleanValueNode
+.. autoclass:: ConstArgumentNode
+.. autoclass:: ConstDirectiveNode
+.. autoclass:: ConstListValueNode
+.. autoclass:: ConstObjectFieldNode
+.. autoclass:: ConstObjectValueNode
+.. autoclass:: ConstValueNode
 .. autoclass:: DefinitionNode
 .. autoclass:: DirectiveDefinitionNode
 .. autoclass:: DirectiveNode
@@ -79,6 +85,7 @@ You can also check the type of nodes with the following predicates:
 .. autofunction:: is_executable_definition_node
 .. autofunction:: is_selection_node
 .. autofunction:: is_value_node
+.. autofunction:: is_const_value_node
 .. autofunction:: is_type_node
 .. autofunction:: is_type_system_definition_node
 .. autofunction:: is_type_definition_node
@@ -105,6 +112,7 @@ Parser
 .. autofunction:: parse
 .. autofunction:: parse_type
 .. autofunction:: parse_value
+.. autofunction:: parse_const_value
 
 Printer
 -------

src/graphql/__init__.py

@@ -177,6 +177,7 @@
     # Parse
     parse,
     parse_value,
+    parse_const_value,
     parse_type,
     # Print
     print_ast,
@@ -195,6 +196,7 @@
     is_executable_definition_node,
     is_selection_node,
     is_value_node,
+    is_const_value_node,
     is_type_node,
     is_type_system_definition_node,
     is_type_definition_node,
@@ -219,20 +221,26 @@
     SelectionNode,
     FieldNode,
     ArgumentNode,
+    ConstArgumentNode,
     FragmentSpreadNode,
     InlineFragmentNode,
     FragmentDefinitionNode,
     ValueNode,
+    ConstValueNode,
     IntValueNode,
     FloatValueNode,
     StringValueNode,
     BooleanValueNode,
     NullValueNode,
     EnumValueNode,
     ListValueNode,
+    ConstListValueNode,
     ObjectValueNode,
+    ConstObjectValueNode,
     ObjectFieldNode,
+    ConstObjectFieldNode,
     DirectiveNode,
+    ConstDirectiveNode,
     TypeNode,
     NamedTypeNode,
     ListTypeNode,
@@ -535,6 +543,7 @@
     "TokenKind",
     "parse",
     "parse_value",
+    "parse_const_value",
     "parse_type",
     "print_ast",
     "visit",
@@ -551,6 +560,7 @@
     "is_executable_definition_node",
     "is_selection_node",
     "is_value_node",
+    "is_const_value_node",
     "is_type_node",
     "is_type_system_definition_node",
     "is_type_definition_node",
@@ -572,20 +582,26 @@
     "SelectionNode",
     "FieldNode",
     "ArgumentNode",
+    "ConstArgumentNode",
     "FragmentSpreadNode",
     "InlineFragmentNode",
     "FragmentDefinitionNode",
     "ValueNode",
+    "ConstValueNode",
     "IntValueNode",
     "FloatValueNode",
     "StringValueNode",
     "BooleanValueNode",
     "NullValueNode",
     "EnumValueNode",
     "ListValueNode",
+    "ConstListValueNode",
     "ObjectValueNode",
+    "ConstObjectValueNode",
     "ObjectFieldNode",
+    "ConstObjectFieldNode",
     "DirectiveNode",
+    "ConstDirectiveNode",
     "TypeNode",
     "NamedTypeNode",
     "ListTypeNode",

src/graphql/language/__init__.py

@@ -14,7 +14,7 @@
 
 from .lexer import Lexer
 
-from .parser import parse, parse_type, parse_value
+from .parser import parse, parse_type, parse_value, parse_const_value
 
 from .printer import print_ast
 
@@ -46,20 +46,26 @@
     SelectionNode,
     FieldNode,
     ArgumentNode,
+    ConstArgumentNode,
     FragmentSpreadNode,
     InlineFragmentNode,
     FragmentDefinitionNode,
     ValueNode,
+    ConstValueNode,
     IntValueNode,
     FloatValueNode,
     StringValueNode,
     BooleanValueNode,
     NullValueNode,
     EnumValueNode,
     ListValueNode,
+    ConstListValueNode,
     ObjectValueNode,
+    ConstObjectValueNode,
     ObjectFieldNode,
+    ConstObjectFieldNode,
     DirectiveNode,
+    ConstDirectiveNode,
     TypeNode,
     NamedTypeNode,
     ListTypeNode,
@@ -93,6 +99,7 @@
     is_executable_definition_node,
     is_selection_node,
     is_value_node,
+    is_const_value_node,
     is_type_node,
     is_type_system_definition_node,
     is_type_definition_node,
@@ -110,6 +117,7 @@
     "Lexer",
     "parse",
     "parse_value",
+    "parse_const_value",
     "parse_type",
     "print_ast",
     "Source",
@@ -137,20 +145,26 @@
     "SelectionNode",
     "FieldNode",
     "ArgumentNode",
+    "ConstArgumentNode",
     "FragmentSpreadNode",
     "InlineFragmentNode",
     "FragmentDefinitionNode",
     "ValueNode",
+    "ConstValueNode",
     "IntValueNode",
     "FloatValueNode",
     "StringValueNode",
     "BooleanValueNode",
     "NullValueNode",
     "EnumValueNode",
     "ListValueNode",
+    "ConstListValueNode",
     "ObjectValueNode",
+    "ConstObjectValueNode",
     "ObjectFieldNode",
+    "ConstObjectFieldNode",
     "DirectiveNode",
+    "ConstDirectiveNode",
     "TypeNode",
     "NamedTypeNode",
     "ListTypeNode",
@@ -182,6 +196,7 @@
     "is_executable_definition_node",
     "is_selection_node",
     "is_value_node",
+    "is_const_value_node",
     "is_type_node",
     "is_type_system_definition_node",
     "is_type_definition_node",