338 lines
11 KiB
C
338 lines
11 KiB
C
/*
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* Nim mode for QEmacs.
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*
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* Copyright (c) 2015-2023 Charlie Gordon.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qe.h"
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#define MAX_KEYWORD_SIZE 16
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/*---------------- Nim coloring ----------------*/
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static char const nim_keywords[] = {
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/* Nim keywords */
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"addr|and|as|asm|atomic|bind|block|break|case|cast|concept|const|"
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"continue|converter|defer|discard|distinct|div|do|elif|else|end|"
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"enum|except|export|finally|for|from|func|generic|if|import|in|include|"
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"interface|is|isnot|iterator|let|macro|method|mixin|mod|nil|not|notin|"
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"object|of|or|out|proc|ptr|raise|ref|return|shl|shr|static|template|"
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"try|tuple|type|using|var|when|while|with|without|xor|yield|"
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/* predefined operators */
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"inc|dec|"
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/* predefined constants */
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"true|false|"
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};
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static char const nim_types[] = {
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"int|uint|cint|cuint|clong|cstring|string|char|byte|bool|"
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"openArray|seq|array|void|pointer|float|csize|cdouble|"
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"cchar|cschar|cshort|cu|nil|expr|stmt|typedesc|auto|any|"
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"range|openarray|varargs|set|cfloat|"
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"int8|int16|int32|int64|uint8|uint16|uint32|uint64|"
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};
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enum {
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NIM_STYLE_TEXT = QE_STYLE_DEFAULT,
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NIM_STYLE_PREPROCESS = QE_STYLE_PREPROCESS,
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NIM_STYLE_COMMENT = QE_STYLE_COMMENT,
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NIM_STYLE_STRING = QE_STYLE_STRING,
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NIM_STYLE_NUMBER = QE_STYLE_NUMBER,
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NIM_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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NIM_STYLE_TYPE = QE_STYLE_TYPE,
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NIM_STYLE_FUNCTION = QE_STYLE_FUNCTION,
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NIM_STYLE_PRAGMA = QE_STYLE_PREPROCESS,
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};
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/* nim-mode colorization states */
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enum {
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IN_NIM_COMMENT = 0x80,
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IN_NIM_CHARLIT = 0x40,
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IN_NIM_STRING = 0x20,
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IN_NIM_LONG_STRING = 0x10,
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IN_NIM_RAW_STRING = 0x08,
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IN_NIM_STRING_BQ = 0x04,
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IN_NIM_PRAGMA = 0x02,
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};
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static void nim_colorize_line(QEColorizeContext *cp,
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char32_t *str, int n, ModeDef *syn)
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{
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int i = 0, start = i, style = 0, klen;
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char32_t c, sep = 0;
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int state = cp->colorize_state;
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char kbuf[64];
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if (state & IN_NIM_COMMENT) {
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goto parse_comment;
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}
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if (state & IN_NIM_CHARLIT) {
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sep = '\'';
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goto parse_string;
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}
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if (state & IN_NIM_STRING) {
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sep = '\"';
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goto parse_string;
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}
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if (state & IN_NIM_LONG_STRING) {
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sep = '\"';
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goto parse_long_string;
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}
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if (state & IN_NIM_STRING_BQ) {
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sep = '`';
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goto parse_string;
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}
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while (i < n) {
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start = i;
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c = str[i++];
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switch (c) {
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case '#':
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if (start == 0 && str[i] == '!') {
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i = n;
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style = NIM_STYLE_PREPROCESS;
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break;
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}
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parse_comment:
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state &= ~IN_NIM_COMMENT;
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/* XXX: should handle trailing backslash more generically */
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for (; i < n; i++) {
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if (str[i] == '\\')
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state |= IN_NIM_COMMENT;
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else
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if (!qe_isblank(str[i]))
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state &= ~IN_NIM_COMMENT;
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}
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style = NIM_STYLE_COMMENT;
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break;
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#if 0
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case 'r':
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case 'R':
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if (str[i] == '\"') {
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state |= IN_NIM_RAW_STRING;
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goto has_quote;
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}
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goto has_alpha;
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#endif
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case '`':
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sep = c;
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style = IN_NIM_STRING_BQ;
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goto parse_string;
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case '\'':
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sep = c;
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style = IN_NIM_CHARLIT;
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goto parse_string;
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case '\"':
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/* parse string const */
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i--;
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has_quote:
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sep = str[i++];
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if (str[i] == sep && str[i + 1] == sep) {
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/* long string */
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state |= IN_NIM_LONG_STRING | IN_NIM_RAW_STRING;
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i += 2;
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parse_long_string:
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while (i < n) {
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c = str[i++];
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if (!(state & IN_NIM_RAW_STRING) && c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == sep && str[i] == sep
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&& str[i + 1] == sep && str[i + 2] != sep) {
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i += 2;
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state &= ~(IN_NIM_LONG_STRING | IN_NIM_RAW_STRING);
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break;
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}
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}
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} else {
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state = IN_NIM_STRING;
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parse_string:
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while (i < n) {
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c = str[i++];
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if (!(state & IN_NIM_RAW_STRING) && c == '\\') {
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if (i < n) {
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i += 1;
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}
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continue;
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}
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if (c == sep) {
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if ((state & IN_NIM_RAW_STRING) && str[i] == '"') {
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i += 1;
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continue;
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}
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state &= ~(IN_NIM_STRING | IN_NIM_RAW_STRING);
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break;
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}
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}
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}
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style = NIM_STYLE_STRING;
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break;
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case '.':
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if (str[i] == '}') {
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i += 1;
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state &= ~IN_NIM_PRAGMA;
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style = NIM_STYLE_PRAGMA;
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break;
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}
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continue;
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// Handle ( ) { } [ ] (. .) {. .} [. .] : :: .. `
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case '{':
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if (str[i] == '.' && str[i + 1] != '.') {
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/* Nim pragmas */
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for (i++;; i++) {
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if (qe_isalnum_(str[i]))
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continue;
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if (str[i] == '.' && str[i + 1] != '}')
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continue;
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break;
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}
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state |= IN_NIM_PRAGMA;
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style = NIM_STYLE_PRAGMA;
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break;
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}
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continue;
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default:
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if (qe_isdigit(c)) {
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int j, k;
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static const char * const suffixes[] = {
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"i8", "i16", "i32", "i64", "u8", "u16", "u32", "u64",
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"f32", "f64", "f128",
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};
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if (c == '0' && qe_match2(str[i], 'b', 'B')) {
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/* binary numbers */
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for (i += 1; qe_isbindigit_(str[i]); i++)
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continue;
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} else
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if (c == '0' && (str[i] == 'o' || qe_match2(str[i], 'c', 'C'))) {
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/* octal numbers */
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for (i += 1; qe_isoctdigit_(str[i]); i++)
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continue;
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} else
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if (c == '0' && qe_match2(str[i], 'x', 'X')) {
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/* hexadecimal numbers */
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for (i += 1; qe_isxdigit_(str[i]); i++)
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continue;
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} else {
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/* decimal numbers */
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for (; qe_isdigit_(str[i]); i++)
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continue;
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if (str[i] == '.' && qe_isdigit_(str[i + 1])) {
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i++;
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/* decimal floats require a digit after the '.' */
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for (; qe_isdigit_(str[i]); i++)
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continue;
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}
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if (qe_match2(str[i], 'e', 'E')) {
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/* skip exponent: potential sign and decimal number if present */
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int k1 = i + 1;
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if (qe_match2(str[k1], '+', '-'))
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k1++;
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if (qe_isdigit(str[k1])) {
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for (i = k1 + 1; qe_isdigit_(str[i]); i++)
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continue;
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}
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}
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}
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/* handle optional ' and type suffix */
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j = i;
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if (str[j] == '\'')
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j++;
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if (qe_isalpha(str[j])) {
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for (k = 0; k < countof(suffixes); k++) {
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/* match keyword, not just prefix */
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if (ustr_match_keyword(str + j, suffixes[k], &klen)) {
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i = j + klen;
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break;
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}
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}
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}
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/* XXX: should detect malformed number constants */
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style = NIM_STYLE_NUMBER;
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break;
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}
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//has_alpha:
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if (qe_isalpha_(c)) {
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i += ustr_get_identifier(kbuf, countof(kbuf), c, str, i, n);
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if (str[i] == '"') {
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/* generalized raw string literal */
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state |= IN_NIM_RAW_STRING;
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goto has_quote;
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}
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if (strfind(syn->keywords, kbuf)) {
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style = NIM_STYLE_KEYWORD;
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break;
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}
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if ((start == 0 || str[start - 1] != '.')
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&& (str[i] != '.')) {
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if (strfind(syn->types, kbuf)) {
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//|| (qe_isupper(c) && haslower)
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style = NIM_STYLE_TYPE;
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break;
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}
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}
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if (check_fcall(str, i)) {
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style = NIM_STYLE_FUNCTION;
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break;
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}
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continue;
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}
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continue;
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}
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if (style) {
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SET_COLOR(str, start, i, style);
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style = 0;
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}
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}
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// XXX: should handle line continuation with trailing \\ followed
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// by white space
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SET_COLOR1(str, n, style); /* set style on eol char */
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cp->colorize_state = state;
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}
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static ModeDef nim_mode = {
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.name = "Nim",
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.extensions = "nim",
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.shell_handlers = "nim",
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.keywords = nim_keywords,
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.types = nim_types,
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.colorize_func = nim_colorize_line,
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};
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static int nim_init(QEmacsState *qs)
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{
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qe_register_mode(&nim_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(nim_init);
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