preproc.h


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#pragma once

#include "defs.h"
#include "utils.h"

DECLARE_VEC(Chunk, ChunkVec)
DECLARE_VEC(Token, TokenVec)

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);