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65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
package parser
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import "fmt"
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// A Token is an object {{ a.b }}, a tag {% if a>b %}, or a text chunk (anything outside of {{}} and {%%}.)
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type Token struct {
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Type TokenType
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SourceLoc SourceLoc
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Name string // Name is the tag name of a tag Chunk. E.g. the tag name of "{% if 1 %}" is "if".
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Args string // Parameters is the tag arguments of a tag Chunk. E.g. the tag arguments of "{% if 1 %}" is "1".
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Source string // Source is the entirety of the token, including the "{{", "{%", etc. markers.
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TrimLeft, TrimRight bool // Trim whitespace left or right of this token; from {{- tag -}} and {%- expr -%}
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}
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// TokenType is the type of a Chunk
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type TokenType int
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////go:generate stringer -type=TokenType
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const (
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// TextTokenType is the type of a text Chunk
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TextTokenType TokenType = iota
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// TagTokenType is the type of a tag Chunk "{%…%}"
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TagTokenType
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// ObjTokenType is the type of an object Chunk "{{…}}"
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ObjTokenType
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)
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// SourceLoc contains a Token's source location.
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type SourceLoc struct {
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Pathname string
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LineNo int
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}
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// SourceLocation returns the token's source location, for use in error reporting.
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func (c Token) SourceLocation() SourceLoc { return c.SourceLoc }
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// SourceText returns the token's source text, for use in error reporting.
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func (c Token) SourceText() string { return c.Source }
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// IsZero returns a boolean indicating whether the location doesn't have a set path.
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func (s SourceLoc) IsZero() bool {
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return s.Pathname == "" && s.LineNo == 0
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}
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func (c Token) String() string {
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switch c.Type {
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case TextTokenType:
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return fmt.Sprintf("%v{%#v}", c.Type, c.Source)
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case TagTokenType:
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return fmt.Sprintf("%v{Tag:%#v, Args:%#v}", c.Type, c.Name, c.Args)
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case ObjTokenType:
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return fmt.Sprintf("%v{%#v}", c.Type, c.Args)
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default:
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return fmt.Sprintf("%v{%#v}", c.Type, c.Source)
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}
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}
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func (s SourceLoc) String() string {
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if s.Pathname != "" {
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return fmt.Sprintf("%s:%d", s.Pathname, s.LineNo)
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}
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return fmt.Sprintf("line %d", s.LineNo)
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}
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