61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
package parse
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import (
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"git.makaay.nl/mauricem/go-parsekit/parse"
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"git.makaay.nl/mauricem/go-parsekit/tokenize"
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"git.makaay.nl/mauricem/go-toml/ast"
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)
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// Some globally useful tokenizer definitions.
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var (
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c, a, m, tok = tokenize.C, tokenize.A, tokenize.M, tokenize.T
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// From the specs: "Whitespace means tab (0x09) or space (0x20)."
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// In this package, we name this a blank, to be in line with the
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// terminology as used in parsekit.
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blank = a.Runes('\t', ' ')
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blanks = c.OneOrMore(blank)
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optionalBlanks = c.ZeroOrMore(blank)
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// Newline means LF (0x0A) or CRLF (0x0D0A).
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// This matches the default newline as defined by parsekit.
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newline = a.Newline
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// Whitespace is defined as blanks + newlines.
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whitespace = c.OneOrMore(blank.Or(newline))
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optionalWhitespace = c.ZeroOrMore(blank.Or(newline))
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// A '#' hash symbol marks the rest of the line as a comment.
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// All characters up to the end of the line are included in the comment.
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comment = c.Seq(a.Hash, c.ZeroOrMore(c.Not(a.EndOfLine)))
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optionalComment = c.Optional(comment)
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endOfLineOrComment = c.Seq(optionalBlanks, optionalComment, a.EndOfLine)
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whitespaceOrComment = whitespace.Or(comment)
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optionalWhitespaceOrComment = c.ZeroOrMore(whitespaceOrComment)
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)
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type parser struct {
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doc *ast.Document
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}
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func newParser() *parser {
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doc := ast.NewDocument()
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return &parser{doc}
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}
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// Run the TOML parser against the provided input data.
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//
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// For an overview of allowed inputs, take a look at the documentation for
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// parsekit.read.New(). At the time of writing, you can make use of
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// strings, types implementing io.Reader and bufio.Readers.
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//
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// This function returns a TOML abstract syntax table structure and an
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// error (or nil when no error occurred). When an error occurred, the
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// TOML ast struct will contain the data that could be parsed up to the error.
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func Run(input interface{}) (ast.Table, error) {
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p := newParser()
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err := parse.New(p.startDocument)(input)
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return p.doc.Root, err
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}
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