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A compiler for generating reliability artifacts from service expectation definitions.
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src/caffeine_lang/frontend/parser_error.gleam
import caffeine_lang/frontend/tokenizer_error
import gleam/int
/// Errors that can occur during parsing.
pub type ParserError {
TokenizerError(tokenizer_error.TokenizerError)
UnexpectedToken(expected: String, got: String, line: Int, column: Int)
UnexpectedEOF(expected: String, line: Int, column: Int)
UnknownType(name: String, line: Int, column: Int)
InvalidRefinement(message: String, line: Int, column: Int)
QuotedFieldName(name: String, line: Int, column: Int)
InvalidTypeAliasName(name: String, message: String, line: Int, column: Int)
}
/// Converts a parser error to a human-readable string.
pub fn to_string(err: ParserError) -> String {
case err {
TokenizerError(tok_err) -> tokenizer_error.to_string(tok_err)
UnexpectedToken(expected, got, line, column) ->
"Unexpected token at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
<> ": expected "
<> expected
<> ", got "
<> got
UnexpectedEOF(expected, line, column) ->
"Unexpected end of file at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
<> ": expected "
<> expected
UnknownType(name, line, column) ->
"Unknown type '"
<> name
<> "' at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
InvalidRefinement(message, line, column) ->
"Invalid refinement at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
<> ": "
<> message
QuotedFieldName(name, line, column) ->
"Quoted field name at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
<> ": field names should not be quoted. Use '"
<> name
<> "' instead of '\""
<> name
<> "\"'"
InvalidTypeAliasName(name, message, line, column) ->
"Invalid type alias name '"
<> name
<> "' at line "
<> int.to_string(line)
<> ", column "
<> int.to_string(column)
<> ": "
<> message
}
}
/// Extracts the line number from a parser error.
pub fn error_line(err: ParserError) -> Int {
case err {
TokenizerError(tok_err) ->
case tok_err {
tokenizer_error.UnterminatedString(line, _) -> line
tokenizer_error.InvalidCharacter(line, _, _) -> line
}
UnexpectedToken(_, _, line, _) -> line
UnexpectedEOF(_, line, _) -> line
UnknownType(_, line, _) -> line
InvalidRefinement(_, line, _) -> line
QuotedFieldName(_, line, _) -> line
InvalidTypeAliasName(_, _, line, _) -> line
}
}
/// Extracts the column number from a parser error.
pub fn error_column(err: ParserError) -> Int {
case err {
TokenizerError(tok_err) ->
case tok_err {
tokenizer_error.UnterminatedString(_, column) -> column
tokenizer_error.InvalidCharacter(_, column, _) -> column
}
UnexpectedToken(_, _, _, column) -> column
UnexpectedEOF(_, _, column) -> column
UnknownType(_, _, column) -> column
InvalidRefinement(_, _, column) -> column
QuotedFieldName(_, _, column) -> column
InvalidTypeAliasName(_, _, _, column) -> column
}
}