elysium/main.go

// The compiler
package main

import (
	"log"
	"os"
)

func main() {
	if len(os.Args) != 2 {
		log.Fatalln("Usage: " + os.Args[0] + " <file>")
	}

	content, err := os.ReadFile(os.Args[1])
	if err != nil {
		log.Fatalln("Cannot open input file.", err)
	}

	tokens, err := lexer(string(content))
	if err != nil {
		if c, ok := err.(CompilerError); ok {
			log.Fatalln(err, "\nv- here\n"+string([]rune(string(content))[c.Position:]))
		}

		log.Fatalln(err)
	}

	log.Printf("Tokens:\n%+#v\n\n", tokens)

	parser := Parser{Tokens: tokens}
	parsed, err := parser.parseFile()
	if err != nil {
		if c, ok := err.(CompilerError); ok {
			log.Fatalln(err, "\nv- here\n"+string([]rune(string(content))[c.Position:]))
		}

		log.Fatalln(err)
	}

	log.Printf("Parsed:\n%+#v\n\n", parsed)

	errors := validator(parsed)
	if len(errors) != 0 {
		for _, err = range errors {
			if c, ok := err.(CompilerError); ok {
				log.Fatalln(err, "\nv- here\n"+string([]rune(string(content))[c.Position:]))
			}

			log.Fatalln(err)
		}
	}

	log.Printf("Validated:\n%+#v\n\n", parsed)
}