mirror of
https://github.com/fish-shell/fish-shell
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81 lines
2 KiB
C++
81 lines
2 KiB
C++
/**\file expression.h
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Programmatic representation of fish code.
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*/
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#ifndef FISH_EXPRESSION_H
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#define FISH_EXPRESSION_H
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#include <wchar.h>
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#include "config.h"
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#include "util.h"
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#include "common.h"
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#include "tokenizer.h"
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class parse_ll_t;
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class parse_sr_t;
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class parse_t
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{
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parse_ll_t * const parser;
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public:
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parse_t();
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void parse(const wcstring &str);
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};
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/* Fish grammar:
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# A statement_list is a list of statements, separated by semicolons or newlines
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statement_list = <empty> |
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statement statement_list
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# A statement is a normal job, or an if / while / and etc.
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statement = boolean_statement | block_statement | decorated_statement
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# A block is a conditional, loop, or begin/end
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block_statement = block_header statement_list END arguments_or_redirections_list
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block_header = if_header | for_header | while_header | function_header | begin_header
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if_header = IF statement
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for_header = FOR var_name IN arguments_or_redirections_list STATEMENT_TERMINATOR
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while_header = WHILE statement
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begin_header = BEGIN STATEMENT_TERMINATOR
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function_header = FUNCTION arguments_or_redirections_list STATEMENT_TERMINATOR
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# A boolean statement is AND or OR or NOT
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boolean_statement = AND statement | OR statement | NOT statement
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# A decorated_statement is a command with a list of arguments_or_redirections, possibly with "builtin" or "command"
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decorated_statement = COMMAND plain_statement | BUILTIN plain_statement | plain_statement
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plain_statement = command arguments_or_redirections_list terminator
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arguments_or_redirections_list = <empty> |
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argument_or_redirection arguments_or_redirections_list
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argument_or_redirection = redirection | <TOK_STRING>
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redirection = <TOK_REDIRECTION>
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terminator = <TOK_END> | <TOK_BACKGROUND>
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*/
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/* fish Shift-Reduce grammar:
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IF <- if_statement
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FOR <- for_statement
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*/
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#endif
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