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87 lines
1.8 KiB
87 lines
1.8 KiB
#include "lel.hpp"
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#include <fmt/core.h>
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%%{
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machine LELParser;
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alphtype char;
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action token {tk = input.substr(start - begin, fpc - start); }
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action col { col(); }
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action ltab { ltab(); }
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action valign { valign(fc); }
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action id { id(input.substr(start - begin, fpc - start)); }
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action row { row(); }
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action align { align(fc); }
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action setwidth { setwidth(std::stoi(tk)); }
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action setheight { setheight(std::stoi(tk)); }
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action expand { expand(); }
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col = "|" $col;
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ltab = "[" $ltab;
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rtab = "]" $row;
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valign = ("^" | ".") $valign;
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expand = "*" $expand;
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halign = ("<" | ">") $align;
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number = digit+ >{ start = fpc; } %token;
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setw = ("(" number %setwidth ("," number %setheight)? ")") ;
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modifiers = (expand | valign | halign | setw);
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id = modifiers* ((alpha | '_')+ :>> (alnum | '_')*) >{start = fpc;} %id;
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row = space* ltab space* id space* (col space* id)* space* rtab space*;
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main := row+;
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}%%
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%% write data;
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bool LELParser::parse(std::string input) {
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int cs = 0;
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const char *start = nullptr;
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const char *begin = input.data();
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const char *p = input.data();
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const char *pe = p + input.size();
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std::string tk;
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%% write init;
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%% write exec;
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bool good = pe - p == 0;
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return good;
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}
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void LELParser::col() {
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fmt::println("col");
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}
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void LELParser::ltab() {
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fmt::println("ltab");
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}
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void LELParser::valign(char dir) {
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fmt::println("valign: {}", dir);
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}
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void LELParser::align(char dir) {
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fmt::println("align {}", dir);
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}
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void LELParser::id(std::string name) {
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fmt::println("id: {}", name);
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}
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void LELParser::row() {
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fmt::println("row");
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}
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void LELParser::setwidth(int width) {
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fmt::println("setwidth: {}", width);
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}
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void LELParser::setheight(int height) {
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fmt::println("setheight: {}", height);
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}
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void LELParser::expand() {
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fmt::println("expand");
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}
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