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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 noinput nounput noyywrap
%{
#include "hilex.h"
%}
%s Assign Preproc
%x Variable 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$]+|. { return Normal; }
}
[[:blank:]]+ { return Normal; }
{operator} { return Operator; }
"."(PHONY|PRECIOUS|SUFFIXES)/{operator}? {
return Keyword;
}
{target}/{operator} { return Ident; }
^"."{ident} |
^"-"?include {
BEGIN(pop = Preproc);
return Macro;
}
<Preproc>{
"\n" {
BEGIN(pop = INITIAL);
return Normal;
}
"\\\n""\t"? { return Normal; }
"\""[^""]*"\"" |
"<"[^>]*">" {
return String;
}
[!<>=]"="?|"||"|"&&" { return Operator; }
[0-9]+|"0x"[[:xdigit:]]+ { return Number; }
defined|make|empty|exists|target|commands|in { return Keyword; }
}
^{ident}/[[:blank:]]*{assign} {
return Ident;
}
{assign} {
BEGIN(pop = Assign);
return Operator;
}
<Assign>{
"\n" {
BEGIN(pop = INITIAL);
return Normal;
}
"\\\n""\t"? { return Escape; }
[^\\$[:space:]]+|. { return String; }
}
{target} { return Ident; }
"#"([^\\\n]|"\\"[^\n]|"\\\n")* { return Comment; }
<*>{
"$"("{"|"(")/[^$] {
depth++;
BEGIN(Variable);
yymore();
}
"$"("{"|"(") {
depth++;
BEGIN(Variable);
return Subst;
}
"$". { return Subst; }
}
<Variable>{
[^${}()]*"}"|")" {
if (!--depth) BEGIN(pop);
return Subst;
}
[^${}()]+ { return Subst; }
}
.|\n { return Normal; }
%%
const struct Lexer LexMake = { yylex, &yyin, &yytext };
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