/* * Elixir language mode for QEmacs. * * Copyright (c) 2000-2020 Charlie Gordon. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "qe.h" extern int erlang_match_char(unsigned int *str, int i); /*---------------- Elixir coloring ----------------*/ static char const elixir_keywords[] = { "|do|end|cond|case|if|else|after|for|unless|when|quote|in" "|try|catch|rescue|raise" "|def|defp|defmodule|defcallback|defmacro|defsequence" "|defmacrop|defdelegate|defstruct|defexception|defimpl" "|require|alias|import|use|fn" "|setup|test|assert|refute|using" "|true|false|nil|and|or|not|_" "|" }; static char const elixir_delim1[] = "\'\"/|([{<"; static char const elixir_delim2[] = "\'\"/|)]}>"; enum { IN_ELIXIR_DELIM = 0x0F, IN_ELIXIR_STRING = 0x10, IN_ELIXIR_REGEX = 0x20, IN_ELIXIR_TRIPLE = 0x40, }; enum { ELIXIR_STYLE_TEXT = QE_STYLE_DEFAULT, ELIXIR_STYLE_COMMENT = QE_STYLE_COMMENT, ELIXIR_STYLE_CHARCONST = QE_STYLE_STRING, ELIXIR_STYLE_STRING = QE_STYLE_STRING, ELIXIR_STYLE_HEREDOC = QE_STYLE_STRING, ELIXIR_STYLE_REGEX = QE_STYLE_STRING, ELIXIR_STYLE_NUMBER = QE_STYLE_NUMBER, ELIXIR_STYLE_KEYWORD = QE_STYLE_KEYWORD, ELIXIR_STYLE_ATOM = QE_STYLE_TYPE, ELIXIR_STYLE_TAG = QE_STYLE_VARIABLE, ELIXIR_STYLE_FUNCTION = QE_STYLE_FUNCTION, ELIXIR_STYLE_PREPROCESS = QE_STYLE_PREPROCESS, }; static void elixir_colorize_line(QEColorizeContext *cp, unsigned int *str, int n, ModeDef *syn) { int i = 0, start = i, c, style = 0, sep, klen, nc, has_under; int state = cp->colorize_state; char kbuf[64]; if (state & IN_ELIXIR_STRING) goto parse_string; if (state & IN_ELIXIR_REGEX) goto parse_regex; while (i < n) { start = i; c = str[i++]; switch (c) { case '#': i = n; style = ELIXIR_STYLE_COMMENT; break; case '?': i = erlang_match_char(str, i); style = ELIXIR_STYLE_CHARCONST; break; case '~': if (qe_tolower(str[i]) == 'r') { nc = qe_indexof(elixir_delim1, str[i + 1]); if (nc >= 0) { i += 2; state = IN_ELIXIR_REGEX | nc; if (nc < 2) { /* '\'' or '\"' */ if (str[i + 0] == (unsigned int)c && str[i + 1] == (unsigned int)c) { state |= IN_ELIXIR_TRIPLE; i += 2; } } parse_regex: sep = elixir_delim2[state & 15]; /* parse regular expression */ while (i < n) { if ((c = str[i++]) == '\\') { if (i < n) i += 1; continue; } if (c == sep) { if (!(state & IN_ELIXIR_TRIPLE)) { state = 0; break; } if (str[i] == (unsigned int)sep && str[i + 1] == (unsigned int)sep) { i += 2; state = 0; break; } } } while (qe_islower(str[i])) { /* regex suffix */ i++; } style = ELIXIR_STYLE_REGEX; break; } } continue; case '\'': case '\"': /* parse string constants and here documents */ state = IN_ELIXIR_STRING | (c == '\"'); if (str[i + 0] == (unsigned int)c && str[i + 1] == (unsigned int)c) { /* here documents */ state |= IN_ELIXIR_TRIPLE; i += 2; } parse_string: sep = elixir_delim2[state & 15]; style = (state & IN_ELIXIR_TRIPLE) ? ELIXIR_STYLE_HEREDOC : ELIXIR_STYLE_STRING; while (i < n) { c = str[i++]; if (c == '\\') { if (i < n) i += 1; continue; } /* XXX: should colorize <% %> expressions and interpolation */ if (c == sep) { if (!(state & IN_ELIXIR_TRIPLE)) { state = 0; break; } if (str[i] == (unsigned int)sep && str[i + 1] == (unsigned int)sep) { i += 2; state = 0; break; } } } break; case '@': case ':': if (qe_isalpha(str[i])) goto has_alpha; continue; case '<': if (str[i] == '%') { i++; if (str[i] == '=') i++; style = ELIXIR_STYLE_PREPROCESS; break; } continue; case '%': if (str[i] == '>') { i++; style = ELIXIR_STYLE_PREPROCESS; break; } continue; default: if (qe_isdigit(c)) { if (c == '0' && qe_tolower(str[i]) == 'b') { /* binary numbers */ for (i += 1; qe_isbindigit(str[i]); i++) continue; } else if (c == '0' && qe_tolower(str[i]) == 'o') { /* octal numbers */ for (i += 1; qe_isoctdigit(str[i]); i++) continue; } else if (c == '0' && qe_tolower(str[i]) == 'x') { /* hexadecimal numbers */ for (i += 1; qe_isxdigit(str[i]); i++) continue; } else { /* decimal numbers */ for (has_under = 0;; i++) { if (qe_isdigit(str[i])) continue; if (str[i] == '_' && qe_isdigit(str[i + 1])) { /* integers may contain embedded _ characters */ has_under = 1; i++; continue; } break; } if (!has_under && str[i] == '.' && qe_isdigit(str[i + 1])) { i += 2; /* decimal floats require a digit after the '.' */ for (; qe_isdigit(str[i]); i++) continue; /* exponent notation requires a decimal point */ if (qe_tolower(str[i]) == 'e') { int k = i + 1; if (str[k] == '+' || str[k] == '-') k++; if (qe_isdigit(str[k])) { for (i = k + 1; qe_isdigit(str[i]); i++) continue; } } } } style = ELIXIR_STYLE_NUMBER; break; } if (qe_isalpha_(c)) { has_alpha: klen = 0; kbuf[klen++] = c; for (; qe_isalnum_(c = str[i]); i++) { if (klen < countof(kbuf) - 1) kbuf[klen++] = c; } if (c == '!' || c == '?') { i++; if (klen < countof(kbuf) - 1) kbuf[klen++] = c; } kbuf[klen] = '\0'; style = 0; if (kbuf[0] == '@') { style = ELIXIR_STYLE_PREPROCESS; } else if (kbuf[0] == ':') { style = ELIXIR_STYLE_ATOM; } else if (strfind(syn->keywords, kbuf)) { style = ELIXIR_STYLE_KEYWORD; } else if (c == ':') { style = ELIXIR_STYLE_TAG; } else if (check_fcall(str, i)) { style = ELIXIR_STYLE_FUNCTION; } break; } continue; } if (style) { SET_COLOR(str, start, i, style); style = 0; } } cp->colorize_state = state; } static ModeDef elixir_mode = { .name = "Elixir", .extensions = "ex|exs", .shell_handlers = "elixir", .keywords = elixir_keywords, .colorize_func = elixir_colorize_line, }; static int elixir_init(void) { qe_register_mode(&elixir_mode, MODEF_SYNTAX); return 0; } qe_module_init(elixir_init);