63 lines
1.7 KiB
Text
63 lines
1.7 KiB
Text
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/*
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* Copyright 2023-2024 FalsePattern
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.falsepattern.zigbrains.zig.stringlexer;
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import com.intellij.lexer.FlexLexer;
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import com.intellij.psi.tree.IElementType;
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import static com.intellij.psi.TokenType.WHITE_SPACE;
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import static com.intellij.psi.TokenType.BAD_CHARACTER;
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import static com.falsepattern.zigbrains.zig.psi.ZigTypes.*;
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import static com.intellij.psi.StringEscapesTokenTypes.*;
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%%
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%public
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%class ZigStringLexer
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%implements FlexLexer
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%function advance
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%type IElementType
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%{
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public ZigStringLexer() {
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}
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%}
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hex=[0-9a-fA-F]
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char_escape_unicode= "\\x" {hex} {hex} | "\\u{" {hex}+ "}"
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char_escape_unicode_invalid= "\\x" | "\\u"
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char_escape_single_valid= "\\" [nr\\t'\"]
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char_escape_single_invalid= "\\" [^nr\\t'\"]
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%state STR
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%%
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<YYINITIAL> {
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"\"" { yybegin(STR); return STRING_LITERAL_SINGLE; }
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[^] { return STRING_LITERAL_SINGLE; }
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}
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<STR> {
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{char_escape_unicode} { return VALID_STRING_ESCAPE_TOKEN; }
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{char_escape_unicode_invalid} { return INVALID_UNICODE_ESCAPE_TOKEN; }
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{char_escape_single_valid} { return VALID_STRING_ESCAPE_TOKEN; }
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{char_escape_single_invalid} { return INVALID_CHARACTER_ESCAPE_TOKEN; }
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[^] { return STRING_LITERAL_SINGLE; }
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}
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