mirror of
https://github.com/carbon-language/carbon-lang.git
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Kareem Ergawyandergawy
a508390423
First change towards re-implementing interfaces using the new parser. I kept it small to make sure we are on the same page regarding stack states and how the parse tree should look like. Co-authored-by: ergawy <kareem.ergawy@guardsquare.com>
124 lines
5.9 KiB
Modula-2
124 lines
5.9 KiB
Modula-2
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// Note that this is an X-macro header.
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//
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// It does not use `#include` guards, and instead is designed to be `#include`ed
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// after the x-macro is defined in order for its inclusion to expand to the
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// desired output.
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//
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// x-macros come in three forms:
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// CARBON_PARSE_NODE_KIND(Name)
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// Used as a fallback if other macros are missing.
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// CARBON_PARSE_NODE_KIND_BRACKET(Name, BracketName)
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// Defines a bracketed node kind. BracketName should refer to the node kind
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// that is the _start_ of the bracketed range.
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// CARBON_PARSE_NODE_KIND_CHILD_COUNT(Name, ChildCount)
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// Defines a parse node with a set number of children, often 0. This count
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// must be correct even when the node contains errors.
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//
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// Macro definitions will be removed at the end of this file to clean up.
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//
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// TODO: Using CHILD_COUNT(..., TodoFixParseNode) to indicate nodes which need to be fixed,
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// sometimes due to inconsistent output in error modes. This is also handled in
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// ParseNodeKind::child_count() and ParseTree::Verify(). All of that can be
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// cleaned up once remainining nodes are fixed.
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#if !(defined(CARBON_PARSE_NODE_KIND) || \
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(defined(CARBON_PARSE_NODE_KIND_BRACKET) && \
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defined(CARBON_PARSE_NODE_KIND_CHILD_COUNT)))
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#error "Must define CARBON_PARSE_NODE_KIND family x-macros to use this file."
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#endif
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// The BRACKET and CHILD_COUNT macros will use CARBON_PARSE_NODE_KIND by default
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// when undefined.
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#ifndef CARBON_PARSE_NODE_KIND_BRACKET
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#define CARBON_PARSE_NODE_KIND_BRACKET(Name, ...) CARBON_PARSE_NODE_KIND(Name)
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#endif
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#ifndef CARBON_PARSE_NODE_KIND_CHILD_COUNT
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#define CARBON_PARSE_NODE_KIND_CHILD_COUNT(Name, ...) \
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CARBON_PARSE_NODE_KIND(Name)
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#endif
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// Declarations.
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(DeclarationEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(EmptyDeclaration, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(DeclaredName, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PackageDirective, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PackageApi, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PackageImpl, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PackageLibrary, 1)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PackageEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(FunctionIntroducer, 0)
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CARBON_PARSE_NODE_KIND_BRACKET(FunctionDeclaration, FunctionIntroducer)
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CARBON_PARSE_NODE_KIND_BRACKET(FunctionDefinition, FunctionDefinitionStart)
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CARBON_PARSE_NODE_KIND_BRACKET(FunctionDefinitionStart, FunctionIntroducer)
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CARBON_PARSE_NODE_KIND_BRACKET(ParameterList, ParameterListStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ParameterListStart, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ParameterListComma, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PatternBinding, 2)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ReturnType, 1)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(VariableDeclaration, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(VariableInitializer, 1)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(FileEnd, 0)
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// Statements.
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CARBON_PARSE_NODE_KIND_BRACKET(CodeBlock, CodeBlockStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(CodeBlockStart, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ExpressionStatement, 1)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(IfStatement, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(IfStatementElse, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(WhileStatement, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(Condition, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ConditionEnd, 0)
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CARBON_PARSE_NODE_KIND_BRACKET(ContinueStatement, ContinueStatementStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ContinueStatementStart, 0)
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CARBON_PARSE_NODE_KIND_BRACKET(BreakStatement, BreakStatementStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(BreakStatementStart, 0)
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CARBON_PARSE_NODE_KIND_BRACKET(ReturnStatement, ReturnStatementStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ReturnStatementStart, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ForStatement, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ForHeader, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ForHeaderEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ForIn, 0)
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// Expressions.
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(Literal, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(TupleLiteral, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(TupleLiteralComma, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(TupleLiteralEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(NameReference, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ParenExpression, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(ParenExpressionEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(DesignatorExpression, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(DesignatedName, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(CallExpression, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(CallExpressionComma, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(CallExpressionEnd, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PrefixOperator, 1)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(InfixOperator, 2)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(PostfixOperator, 1)
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// Struct literals.
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CARBON_PARSE_NODE_KIND_BRACKET(StructLiteral,
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StructLiteralOrStructTypeLiteralStart)
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CARBON_PARSE_NODE_KIND_BRACKET(StructTypeLiteral,
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StructLiteralOrStructTypeLiteralStart)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(StructLiteralOrStructTypeLiteralStart, 0)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(StructFieldDesignator, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(StructFieldValue, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(StructFieldType, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(StructComma, 0)
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// Interfaces
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(InterfaceDefinition, TodoFixParseNode)
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CARBON_PARSE_NODE_KIND_CHILD_COUNT(InterfaceBodyStart, 0)
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CARBON_PARSE_NODE_KIND_BRACKET(InterfaceBody, InterfaceBodyStart)
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#undef CARBON_PARSE_NODE_KIND
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#undef CARBON_PARSE_NODE_KIND_BRACKET
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#undef CARBON_PARSE_NODE_KIND_CHILD_COUNT
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