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#pragma once
#include "utils.h"
typedef struct Region Region;
// Lexing stage
typedef enum {
UN_Q,
SINGLE_Q,
DOUBLE_Q,
} QuotationMode;
typedef enum {
LITERAL,
REGION_EXP,
VAR_EXP, // TODO: Later include other exps
} ChunkKind;
typedef struct {
ChunkKind kind;
QuotationMode qmode;
union {
char* literal_str;
Region* reg_ptr;
char* varname;
} as;
} Chunk;
DECLARE_MAYBE(Chunk, MaybeChunk);
DECLARE_VEC(Chunk*, Word)
typedef enum {
TOK_WORD,
TOK_SPECIAL,
TOK_PROCSUB_IN,
TOK_PROCSUB_OUT,
} TokenKind;
typedef enum {
PIPE,
WRITE_REDIR_TRUNC,
WRITE_REDIR_APPEND,
READ_REDIR,
EOL,
} SpecialToken;
DECLARE_MAYBE(SpecialToken, MaybeSpecialToken)
typedef struct {
TokenKind kind;
union {
Word word;
SpecialToken spec;
Region* procsub_region;
} as;
} Token;
DECLARE_VEC(Token*, TokenPtrVec)
typedef enum {
CMDS,
ARITHM,
} RegionMode;
struct Region {
RegionMode mode;
TokenPtrVec tokens;
};
DECLARE_VEC(Region, RegionVec)
DECLARE_VEC(Chunk, ChunkVec)
DECLARE_VEC(Token, TokenVec)
// Lexing
typedef struct {
RegionVec regions;
TokenVec tokens;
ChunkVec chunks;
} PreprocArena;
TokenPtrVec lex(char* input, PreprocArena* arena);
// Parsing
typedef enum {
STDIN_REDIR,
STDOUT_REDIR_TRUNC,
STDOUT_REDIR_APPEND,
} RedirKind;
typedef struct {
RedirKind kind;
union {
Word std_redir_filename;
} as;
} Redirect;
DECLARE_VEC(Redirect, RedirectVec)
typedef struct {
TokenVec args;
RedirectVec redirects;
// TODO: prefix variable settings
} Command;
typedef enum {
CONN_PIPE,
CONN_EOL,
// TODO: add the |& thingy
} Connector;
DECLARE_MAYBE(Connector, MaybeConnector)
typedef struct {
Command cmd;
Connector conn;
} PipelineElement;
DECLARE_VEC(PipelineElement, Pipeline)
Pipeline parse_tokstream(Token* tokstream);
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