Added base function parsing

parser/func.go

@@ -0,0 +1,30 @@
+package parser
+
+import "git.tebibyte.media/sashakoshka/arf/types"
+import "git.tebibyte.media/sashakoshka/arf/lexer"
+// import "git.tebibyte.media/sashakoshka/arf/infoerr"
+
+// parseFunc parses a function section.
+func (parser *ParsingOperation) parseFuncSection () (
+	section *FuncSection,
+	err     error,
+) {
+	err = parser.expect(lexer.TokenKindName)
+	if err != nil { return }
+	
+	section = &FuncSection { location: parser.token.Location() }
+
+	err = parser.nextToken(lexer.TokenKindPermission)
+	if err != nil { return }
+	section.permission = parser.token.Value().(types.Permission)
+
+	err = parser.nextToken(lexer.TokenKindName)
+	if err != nil { return }
+	section.name = parser.token.Value().(string)
+
+	err = parser.nextToken(lexer.TokenKindNewline)
+	if err != nil { return }
+	
+	return
+}
+