100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
#ifndef PARSING_UTILS_H
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#define PARSING_UTILS_H
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#include "../lexer/lexer.h"
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// === Macros
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#define PEEK_TOKEN() \
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peek_token(ctx); \
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if (token == NULL) \
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{ \
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puts("Internal error: cannot get the following token"); \
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return NULL; \
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}
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#define POP_TOKEN() \
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pop_token(ctx); \
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if (token == NULL) \
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{ \
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puts("Internal error: cannot get the following token"); \
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return NULL; \
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}
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/* @brief Acts as the entry point of the parser, calls parse_list
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*
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* @code input = list '\n'
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* | list EOF
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* | '\n'
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* | EOF
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* ;
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*/
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struct ast *parse_input(struct lexer_context *ctx);
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/* @brief: parses a list of [and_or] rules separated by semicolons and that
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* ends by a newline
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*
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* @code list = and_or { ';' and_or } [ ';' ] ;
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*/
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struct ast *parse_list(struct lexer_context *ctx);
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/* @brief Only parses a pipeline rule for the moment
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*
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* @code and_or = pipeline ;
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*/
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struct ast *parse_and_or(struct lexer_context *ctx);
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/* @brief Only parses a command rule for the moment
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*
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* @code pipeline = command ;
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*/
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struct ast *parse_pipeline(struct lexer_context *ctx);
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/* @brief Parses a simple command rule or a shell command rule depending on
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* the first token.
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* @note
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* TOKEN_WORD => simple_command
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* TOKEN_IF => shell_command
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*
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* @code command = simple_command
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* | shell_command
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* ;
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*/
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struct ast *parse_command(struct lexer_context *ctx);
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/* @brief Parses a simple list of words (command and arguments)
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* ending by a separator
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*
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* @code simple_command = WORD { element } ;
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*/
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struct ast *parse_simple_command(struct lexer_context *ctx);
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/* @brief Only parses if rules for the moment
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*
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* @code shell_command = if_rule ;
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*/
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struct ast *parse_shell_command(struct lexer_context *ctx);
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/* @brief Parses a if rule (condition, then-clause, elif-clause, else-clause)
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*
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* @code if_rule = 'if' compound_list 'then' compound_list [else_clause] 'fi' ;
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*/
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struct ast *parse_if_rule(struct lexer_context *ctx);
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/* @brief parses commands inside if/else clauses and returns the corresponding
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* AST list
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*
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* @code compound_list = {'\n'} and_or { ( ';' | '\n' ) {'\n'} and_or } [';']
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* {'\n'} ;
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*/
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struct ast *parse_compound_list(struct lexer_context *ctx);
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/* @brief
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*
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* @code else_clause = 'else' compound_list
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* | 'elif' compound_list 'then' compound_list [else_clause]
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* ;
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*/
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struct ast *parse_else_clause(struct lexer_context *ctx);
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#endif /* ! PARSING_UTILS_H */
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