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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef TOOLS_GN_PARSER_H_ | 5 #ifndef TOOLS_GN_PARSER_H_ |
6 #define TOOLS_GN_PARSER_H_ | 6 #define TOOLS_GN_PARSER_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
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51 // Vector must be valid for lifetime of call. | 51 // Vector must be valid for lifetime of call. |
52 Parser(const std::vector<Token>& tokens, Err* err); | 52 Parser(const std::vector<Token>& tokens, Err* err); |
53 ~Parser(); | 53 ~Parser(); |
54 | 54 |
55 std::unique_ptr<ParseNode> ParseExpression(); | 55 std::unique_ptr<ParseNode> ParseExpression(); |
56 | 56 |
57 // Parses an expression with the given precedence or higher. | 57 // Parses an expression with the given precedence or higher. |
58 std::unique_ptr<ParseNode> ParseExpression(int precedence); | 58 std::unique_ptr<ParseNode> ParseExpression(int precedence); |
59 | 59 |
60 // |PrefixFunc|s used in parsing expressions. | 60 // |PrefixFunc|s used in parsing expressions. |
| 61 std::unique_ptr<ParseNode> Block(Token token); |
61 std::unique_ptr<ParseNode> Literal(Token token); | 62 std::unique_ptr<ParseNode> Literal(Token token); |
62 std::unique_ptr<ParseNode> Name(Token token); | 63 std::unique_ptr<ParseNode> Name(Token token); |
63 std::unique_ptr<ParseNode> Group(Token token); | 64 std::unique_ptr<ParseNode> Group(Token token); |
64 std::unique_ptr<ParseNode> Not(Token token); | 65 std::unique_ptr<ParseNode> Not(Token token); |
65 std::unique_ptr<ParseNode> List(Token token); | 66 std::unique_ptr<ParseNode> List(Token token); |
66 std::unique_ptr<ParseNode> BlockComment(Token token); | 67 std::unique_ptr<ParseNode> BlockComment(Token token); |
67 | 68 |
68 // |InfixFunc|s used in parsing expressions. | 69 // |InfixFunc|s used in parsing expressions. |
69 std::unique_ptr<ParseNode> BinaryOperator(std::unique_ptr<ParseNode> left, | 70 std::unique_ptr<ParseNode> BinaryOperator(std::unique_ptr<ParseNode> left, |
70 Token token); | 71 Token token); |
71 std::unique_ptr<ParseNode> IdentifierOrCall(std::unique_ptr<ParseNode> left, | 72 std::unique_ptr<ParseNode> IdentifierOrCall(std::unique_ptr<ParseNode> left, |
72 Token token); | 73 Token token); |
73 std::unique_ptr<ParseNode> Assignment(std::unique_ptr<ParseNode> left, | 74 std::unique_ptr<ParseNode> Assignment(std::unique_ptr<ParseNode> left, |
74 Token token); | 75 Token token); |
75 std::unique_ptr<ParseNode> Subscript(std::unique_ptr<ParseNode> left, | 76 std::unique_ptr<ParseNode> Subscript(std::unique_ptr<ParseNode> left, |
76 Token token); | 77 Token token); |
77 std::unique_ptr<ParseNode> DotOperator(std::unique_ptr<ParseNode> left, | 78 std::unique_ptr<ParseNode> DotOperator(std::unique_ptr<ParseNode> left, |
78 Token token); | 79 Token token); |
79 | 80 |
80 // Helper to parse a comma separated list, optionally allowing trailing | 81 // Helper to parse a comma separated list, optionally allowing trailing |
81 // commas (allowed in [] lists, not in function calls). | 82 // commas (allowed in [] lists, not in function calls). |
82 std::unique_ptr<ListNode> ParseList(Token start_token, | 83 std::unique_ptr<ListNode> ParseList(Token start_token, |
83 Token::Type stop_before, | 84 Token::Type stop_before, |
84 bool allow_trailing_comma); | 85 bool allow_trailing_comma); |
85 | 86 |
86 std::unique_ptr<ParseNode> ParseFile(); | 87 std::unique_ptr<ParseNode> ParseFile(); |
87 std::unique_ptr<ParseNode> ParseStatement(); | 88 std::unique_ptr<ParseNode> ParseStatement(); |
88 std::unique_ptr<BlockNode> ParseBlock(); | 89 // Expects to be passed the token corresponding to the '{' and that the |
| 90 // current token is the one following the '{'. |
| 91 std::unique_ptr<BlockNode> ParseBlock(Token being_brace, |
| 92 BlockNode::ResultMode result_mode); |
89 std::unique_ptr<ParseNode> ParseCondition(); | 93 std::unique_ptr<ParseNode> ParseCondition(); |
90 | 94 |
91 // Generates a pre- and post-order traversal of the tree. | 95 // Generates a pre- and post-order traversal of the tree. |
92 void TraverseOrder(const ParseNode* root, | 96 void TraverseOrder(const ParseNode* root, |
93 std::vector<const ParseNode*>* pre, | 97 std::vector<const ParseNode*>* pre, |
94 std::vector<const ParseNode*>* post); | 98 std::vector<const ParseNode*>* post); |
95 | 99 |
96 // Attach comments to nearby syntax. | 100 // Attach comments to nearby syntax. |
97 void AssignComments(ParseNode* file); | 101 void AssignComments(ParseNode* file); |
98 | 102 |
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130 FRIEND_TEST_ALL_PREFIXES(Parser, Expression); | 134 FRIEND_TEST_ALL_PREFIXES(Parser, Expression); |
131 FRIEND_TEST_ALL_PREFIXES(Parser, FunctionCall); | 135 FRIEND_TEST_ALL_PREFIXES(Parser, FunctionCall); |
132 FRIEND_TEST_ALL_PREFIXES(Parser, List); | 136 FRIEND_TEST_ALL_PREFIXES(Parser, List); |
133 FRIEND_TEST_ALL_PREFIXES(Parser, ParenExpression); | 137 FRIEND_TEST_ALL_PREFIXES(Parser, ParenExpression); |
134 FRIEND_TEST_ALL_PREFIXES(Parser, UnaryOp); | 138 FRIEND_TEST_ALL_PREFIXES(Parser, UnaryOp); |
135 | 139 |
136 DISALLOW_COPY_AND_ASSIGN(Parser); | 140 DISALLOW_COPY_AND_ASSIGN(Parser); |
137 }; | 141 }; |
138 | 142 |
139 #endif // TOOLS_GN_PARSER_H_ | 143 #endif // TOOLS_GN_PARSER_H_ |
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