README
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Go port
NOTE: To use the Go version you MUST make some tweaks to the grammar files manually in order to have no compiler errors.
- In the
JavaScriptLexer.g4file, replace all occurrences ofthiswith:linside actions (i.e., next toProcessOpenBrace,ProcessCloseBrace,ProcessStringLiteral).pinside predicates (i.e., all other).
- In the
JavaScriptParser.g4file:- Replace all occurrences of
thiswithp. - Replace all occurrences of
emptyStatementparser rule withemptyStatement_.
- Replace all occurrences of
WARNING: After generating both the parser and the lexer, there will be 1 runtime error.
The runtime error is caused by a nil pointer dereference, to fix this go to the generated file
javascript_lexer.go and replace use of *JavaScriptLexerBase with JavaScriptLexerBase
(i.e., remove *).
The cause for this is that ANTLR4 automatically adds a pointer to the embedded superClass inside
[GrammarName]Lexer (JavaScriptLexer in this case) for the Go language. This behaviour is expected
for single-file grammars (i.e. Both lexer and parser are inside the same file).
But it does not work for multi-file settings where the superClass option is set on the lexer grammar.
For more information how to use Go target, see documentation.
Documentation
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Index ¶
- type JavaScriptLexerBase
- func (l *JavaScriptLexerBase) IsRegexPossible() bool
- func (l *JavaScriptLexerBase) IsStartOfFile() bool
- func (l *JavaScriptLexerBase) IsStrictMode() bool
- func (l *JavaScriptLexerBase) NextToken() antlr.Token
- func (l *JavaScriptLexerBase) ProcessCloseBrace()
- func (l *JavaScriptLexerBase) ProcessOpenBrace()
- func (l *JavaScriptLexerBase) ProcessStringLiteral()
- type JavaScriptParserBase
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type JavaScriptLexerBase ¶
JavaScriptLexerBase state
func (*JavaScriptLexerBase) IsRegexPossible ¶
func (l *JavaScriptLexerBase) IsRegexPossible() bool
IsRegexPossible returns true if the lexer can match a regex literal.
func (*JavaScriptLexerBase) IsStartOfFile ¶
func (l *JavaScriptLexerBase) IsStartOfFile() bool
func (*JavaScriptLexerBase) IsStrictMode ¶
func (l *JavaScriptLexerBase) IsStrictMode() bool
IsStrictMode is self explanatory.
func (*JavaScriptLexerBase) NextToken ¶
func (l *JavaScriptLexerBase) NextToken() antlr.Token
NextToken from the character stream.
func (*JavaScriptLexerBase) ProcessCloseBrace ¶
func (l *JavaScriptLexerBase) ProcessCloseBrace()
ProcessCloseBrace is called when a } is encountered during lexing, we pop a scope unless we're inside global scope.
func (*JavaScriptLexerBase) ProcessOpenBrace ¶
func (l *JavaScriptLexerBase) ProcessOpenBrace()
ProcessOpenBrace is called when a { is encountered during lexing, we push a new scope everytime.
func (*JavaScriptLexerBase) ProcessStringLiteral ¶
func (l *JavaScriptLexerBase) ProcessStringLiteral()
ProcessStringLiteral is called when lexing a string literal.
type JavaScriptParserBase ¶
type JavaScriptParserBase struct {
*antlr.BaseParser
}
JavaScriptParserBase implementation.
Source Files