continue cmd

cmd/cmd.go

@@ -3,11 +3,18 @@ package main
 import (
 	"flag"
 	"fmt"
+	"io"
 	"os"
+	"path/filepath"
+	"strings"
+
+	"robaertschi.xyz/robaertschi/tt/lexer"
+	"robaertschi.xyz/robaertschi/tt/parser"
+	"robaertschi.xyz/robaertschi/tt/token"
+	"robaertschi.xyz/robaertschi/tt/typechecker"
 )
 
 func main() {
-
 	flag.Usage = func() {
 		fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s [flags] input\nPossible flags:\n", os.Args[0])
 		flag.PrintDefaults()
@@ -23,4 +30,50 @@ func main() {
 		flag.Usage()
 		os.Exit(1)
 	}
+
+	if output == "" {
+		output = strings.TrimRight(input, filepath.Ext(input))
+	}
+
+	file, err := os.Open(input)
+	if err != nil {
+		fmt.Printf("Could not open file %q because: %e", input, err)
+		os.Exit(1)
+	}
+	defer file.Close()
+
+	inputText, err := io.ReadAll(file)
+	if err != nil {
+		fmt.Printf("Could not read file %q because: %e", input, err)
+		os.Exit(1)
+	}
+
+	l, err := lexer.New(string(inputText), input)
+	if err != nil {
+		fmt.Printf("Error while creating lexer: %e", err)
+		os.Exit(1)
+	}
+
+	l.WithErrorCallback(func(l token.Loc, s string, a ...any) {
+		fmt.Printf("%s:%d:%d: %s\n", l.File, l.Line, l.Col, fmt.Sprintf(s, a...))
+	})
+
+	p := parser.New(l)
+	p.WithErrorCallback(func(t token.Token, s string, a ...any) {
+		loc := t.Loc
+		fmt.Printf("%s:%d:%d: %s\n", loc.File, loc.Line, loc.Col, fmt.Sprintf(s, a...))
+	})
+
+	program := p.ParseProgram()
+
+	if p.Errors() > 0 {
+		fmt.Printf("Parser encountered 1 or more errors, quiting...\n")
+		os.Exit(1)
+	}
+
+	tprogram, err := typechecker.New().CheckProgram(program)
+	if err != nil {
+		fmt.Printf("Typechecker failed with %e\n", err)
+		os.Exit(1)
+	}
 }

parser/parser.go

@@ -51,6 +51,10 @@ func (p *Parser) WithErrorCallback(errorCallback ErrorCallback) {
 	p.errorCallback = errorCallback
 }
 
+func (p *Parser) Errors() int {
+	return p.errors
+}
+
 func (p *Parser) registerInfixFn(tt token.TokenType, infix infixParseFn) {
 	p.infixParseFns[tt] = infix
 }