92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package parser
|
|
|
|
import "git.tebibyte.media/sashakoshka/arf/lexer"
|
|
import "git.tebibyte.media/sashakoshka/arf/infoerr"
|
|
|
|
var validArgumentStartTokens = []lexer.TokenKind {
|
|
lexer.TokenKindName,
|
|
|
|
lexer.TokenKindInt,
|
|
lexer.TokenKindUInt,
|
|
lexer.TokenKindFloat,
|
|
lexer.TokenKindString,
|
|
lexer.TokenKindRune,
|
|
|
|
lexer.TokenKindLBrace,
|
|
lexer.TokenKindLBracket,
|
|
}
|
|
|
|
func (parser *ParsingOperation) parseArgument () (argument Argument, err error) {
|
|
argument.location = parser.token.Location()
|
|
|
|
err = parser.expect(validArgumentStartTokens...)
|
|
if err != nil { return }
|
|
|
|
switch parser.token.Kind() {
|
|
case lexer.TokenKindName:
|
|
var identifier Identifier
|
|
identifier, err = parser.parseIdentifier()
|
|
if err != nil { return }
|
|
|
|
if parser.token.Is(lexer.TokenKindColon) {
|
|
var what Type
|
|
what, err = parser.parseType()
|
|
if err != nil { return }
|
|
|
|
if len(identifier.trail) != 1 {
|
|
err = parser.token.NewError (
|
|
"cannot use member selection in " +
|
|
"a variable definition",
|
|
infoerr.ErrorKindError)
|
|
return
|
|
}
|
|
|
|
argument.kind = ArgumentKindDeclaration
|
|
argument.value = Declaration {
|
|
location: argument.location,
|
|
name: identifier.trail[0],
|
|
what: what,
|
|
}
|
|
} else {
|
|
argument.kind = ArgumentKindIdentifier
|
|
argument.value = identifier
|
|
}
|
|
|
|
case lexer.TokenKindInt:
|
|
argument.kind = ArgumentKindInt
|
|
argument.value = parser.token.Value().(int64)
|
|
err = parser.nextToken()
|
|
|
|
case lexer.TokenKindUInt:
|
|
argument.kind = ArgumentKindUInt
|
|
argument.value = parser.token.Value().(uint64)
|
|
err = parser.nextToken()
|
|
|
|
case lexer.TokenKindFloat:
|
|
argument.kind = ArgumentKindFloat
|
|
argument.value = parser.token.Value().(float64)
|
|
err = parser.nextToken()
|
|
|
|
case lexer.TokenKindString:
|
|
argument.kind = ArgumentKindString
|
|
argument.value = parser.token.Value().(string)
|
|
parser.nextToken()
|
|
|
|
case lexer.TokenKindRune:
|
|
argument.kind = ArgumentKindRune
|
|
argument.value = parser.token.Value().(rune)
|
|
parser.nextToken()
|
|
|
|
// case lexer.TokenKindLBrace:
|
|
|
|
// case lexer.TokenKindLBracket:
|
|
|
|
default:
|
|
panic (
|
|
"unimplemented argument kind " +
|
|
parser.token.Kind().Describe())
|
|
}
|
|
|
|
return
|
|
}
|