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/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
%option prefix="make"
%option noyywrap
%{
#include "hilex.h"
%}
%s Assign
%x Interp Shell
ident [._[:alnum:]]+
assign [+?:!]?=
target [-._/?*\[\][:alnum:]]+
operator [:!]|::
%%
static int pop = INITIAL;
static int depth = 0;
^"\t"+ {
BEGIN(pop = Shell);
return Normal;
}
<Shell>{
"\n" {
BEGIN(pop = INITIAL);
return Normal;
}
"\\\n" { return Normal; }
[^\\\n$]+|. { return Normal; }
}
[[:blank:]]+ { return Normal; }
{operator} { return Operator; }
"."(PHONY|PRECIOUS|SUFFIXES)/{operator}? {
return Keyword;
}
^{ident}/[[:blank:]]*{assign} {
return Identifier;
}
{assign} {
BEGIN(pop = Assign);
return Operator;
}
<Assign>{
"\n" {
BEGIN(pop = INITIAL);
return Normal;
}
"\\\n" { return String; }
[^\\$[:space:]]+|. { return String; }
}
^"-"?include { return Macro; }
{target}([[:blank:]]+{target})*/{operator} {
return IdentifierTag;
}
{target} { return Identifier; }
"#"([^\\\n]|"\\"[^\n]|"\\\n")* { return Comment; }
<*>{
"$"("{"|"(") {
depth++;
BEGIN(Interp);
return Interpolation;
}
"$". { return Interpolation; }
}
<Interp>{
"}"|")" {
if (!--depth) BEGIN(pop);
return Interpolation;
}
[^${}()]+ { return Interpolation; }
}
.|\n { return Normal; }
%{
(void)yyunput;
(void)input;
%}
%%
const struct Lexer LexMake = { yylex, &yyin, &yytext };
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