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Factor out an UpperMap for case-insensitive matching

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This commit is contained in:
Rangi42
2025-07-27 23:14:52 -04:00
parent d16751f56a
commit 75aed1afd5
8 changed files with 87 additions and 84 deletions
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50
src/link/lexer.cpp
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@@ -3,12 +3,10 @@
#include "link/lexer.hpp"
#include <array>
#include <ctype.h>
#include <errno.h>
#include <fstream>
#include <inttypes.h>
#include <stdio.h>
#include <string_view>
#include <vector>
#include "helpers.hpp"
@@ -265,22 +263,6 @@ static yy::parser::symbol_type parseString() {
return yy::parser::make_string(std::move(str));
}
struct Keyword {
std::string_view name;
yy::parser::symbol_type (*tokenGen)();
};
using namespace std::literals;
static std::array keywords{
Keyword{"ORG"sv, yy::parser::make_ORG },
Keyword{"FLOATING"sv, yy::parser::make_FLOATING},
Keyword{"INCLUDE"sv, yy::parser::make_INCLUDE },
Keyword{"ALIGN"sv, yy::parser::make_ALIGN },
Keyword{"DS"sv, yy::parser::make_DS },
Keyword{"OPTIONAL"sv, yy::parser::make_OPTIONAL},
};
yy::parser::symbol_type yylex() {
LexerStackEntry &context = lexerStack.back();
int c = context.file.sbumpc();
@@ -320,18 +302,30 @@ yy::parser::symbol_type yylex() {
} else if (isIdentChar(c)) { // Note that we match these *after* digit characters!
std::string ident = readIdent(c);
auto strUpperCmp = [](char cmp, char ref) { return toupper(cmp) == ref; };
for (SectionType type : EnumSeq(SECTTYPE_INVALID)) {
if (std::equal(RANGE(ident), RANGE(sectionTypeInfo[type].name), strUpperCmp)) {
return yy::parser::make_sect_type(type);
}
static UpperMap<SectionType> const sectTypes{
{"WRAM0", SECTTYPE_WRAM0},
{"VRAM", SECTTYPE_VRAM },
{"ROMX", SECTTYPE_ROMX },
{"ROM0", SECTTYPE_ROM0 },
{"HRAM", SECTTYPE_HRAM },
{"WRAMX", SECTTYPE_WRAMX},
{"SRAM", SECTTYPE_SRAM },
{"OAM", SECTTYPE_OAM },
};
if (auto search = sectTypes.find(ident); search != sectTypes.end()) {
return yy::parser::make_sect_type(search->second);
}
for (Keyword const &keyword : keywords) {
if (std::equal(RANGE(ident), RANGE(keyword.name), strUpperCmp)) {
return keyword.tokenGen();
}
static UpperMap<yy::parser::symbol_type (*)()> const keywords{
{"ORG", yy::parser::make_ORG },
{"FLOATING", yy::parser::make_FLOATING},
{"INCLUDE", yy::parser::make_INCLUDE },
{"ALIGN", yy::parser::make_ALIGN },
{"DS", yy::parser::make_DS },
{"OPTIONAL", yy::parser::make_OPTIONAL},
};
if (auto search = keywords.find(ident); search != keywords.end()) {
return search->second();
}
lexer_Error("Unknown keyword \"%s\"", ident.c_str());