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Merge pull request #1 from Jintumoni/feature/better-syntax-error
Show better error messages
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| package errors | ||
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| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "strings" | ||
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| "github.com/Jintumoni/vortex/lexer" | ||
| "github.com/Jintumoni/vortex/nodes" | ||
| "github.com/fatih/color" | ||
| ) | ||
|
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| type UnexpectedToken struct { | ||
| SourceContext string | ||
| ActualToken *lexer.Token | ||
| ExpectedToken lexer.TokenType | ||
| SuggestedTokens []lexer.TokenType | ||
| } | ||
|
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| func (e *UnexpectedToken) Error() string { | ||
| buffer := new(bytes.Buffer) | ||
| buffer.WriteString(color.RedString(fmt.Sprintf("Error: Unexpected \"%s\" found\n", e.ActualToken.Value))) | ||
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| buffer.WriteString(e.SourceContext) | ||
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| buffer.WriteString(strings.Repeat("\t", 2)) | ||
| buffer.WriteString(strings.Repeat(" ", e.ActualToken.Col)) | ||
| // buffer.WriteString("\033[31m") | ||
| buffer.WriteString(color.BlueString(strings.Repeat("^", e.ActualToken.Span))) | ||
| buffer.WriteString(color.BlueString("--")) | ||
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| if e.SuggestedTokens != nil { | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("Expected one of: "))) | ||
| for i, t := range e.SuggestedTokens { | ||
| if i > 0 { | ||
| buffer.WriteString(color.BlueString(", ")) | ||
| } | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("\"%s\"", t))) | ||
| } | ||
| } else if e.ExpectedToken != 0 { | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("Did you mean \"%s\"?", e.ExpectedToken))) | ||
| } else { | ||
| buffer.WriteString(color.BlueString("here")) | ||
| } | ||
| // buffer.WriteString("\033[0m") | ||
| buffer.WriteString("\n") | ||
|
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| return buffer.String() | ||
| } | ||
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| type UnknownEdgeType struct { | ||
| SourceContext string | ||
| ActualToken *lexer.Token | ||
| } | ||
|
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| func (e *UnknownEdgeType) Error() string { | ||
| buffer := new(bytes.Buffer) | ||
| buffer.WriteString(color.RedString(fmt.Sprintf("Error: Unknown \"%s\" found\n", e.ActualToken.Value))) | ||
|
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| buffer.WriteString(e.SourceContext) | ||
|
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| buffer.WriteString(strings.Repeat("\t", 2)) | ||
| buffer.WriteString(strings.Repeat(" ", e.ActualToken.Col)) | ||
|
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| buffer.WriteString(color.BlueString(strings.Repeat("^", e.ActualToken.Span))) | ||
| buffer.WriteString(color.BlueString("--")) | ||
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| buffer.WriteString(color.BlueString(fmt.Sprintf("Expected one of: "))) | ||
| for i, t := range nodes.GetAllEdgeTypes() { | ||
| if i > 0 { | ||
| buffer.WriteString(color.BlueString(", ")) | ||
| } | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("\"%s\"", t))) | ||
| } | ||
| buffer.WriteString("\n") | ||
|
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| return buffer.String() | ||
| } | ||
|
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| type UnknownStatement struct { | ||
| SourceContext string | ||
| ActualToken *lexer.Token | ||
| } | ||
|
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| func (e *UnknownStatement) Error() string { | ||
| buffer := new(bytes.Buffer) | ||
| buffer.WriteString(color.RedString(fmt.Sprintf("Error: Unknown \"%s\" found\n", e.ActualToken.Value))) | ||
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| buffer.WriteString(e.SourceContext) | ||
|
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| buffer.WriteString(strings.Repeat("\t", 2)) | ||
| buffer.WriteString(strings.Repeat(" ", e.ActualToken.Col)) | ||
|
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| buffer.WriteString(color.BlueString(strings.Repeat("^", e.ActualToken.Span))) | ||
| buffer.WriteString(color.BlueString("--")) | ||
|
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| buffer.WriteString(color.BlueString(fmt.Sprintf("Expected one of: "))) | ||
| for i, t := range lexer.GetAllStatementTypes() { | ||
| if i > 0 { | ||
| buffer.WriteString(color.BlueString(", ")) | ||
| } | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("\"%s\"", t))) | ||
| } | ||
| buffer.WriteString("\n") | ||
|
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| return buffer.String() | ||
| } | ||
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| type UnknownBuiltinFunc struct { | ||
| SourceContext string | ||
| ActualToken *lexer.Token | ||
| } | ||
|
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| func (e *UnknownBuiltinFunc) Error() string { | ||
| buffer := new(bytes.Buffer) | ||
| buffer.WriteString(color.RedString(fmt.Sprintf("Error: Unknown \"%s\" found\n", e.ActualToken.Value))) | ||
|
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| buffer.WriteString(e.SourceContext) | ||
|
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| buffer.WriteString(strings.Repeat("\t", 2)) | ||
| buffer.WriteString(strings.Repeat(" ", e.ActualToken.Col)) | ||
|
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| buffer.WriteString(color.BlueString(strings.Repeat("^", e.ActualToken.Span))) | ||
| buffer.WriteString(color.BlueString("--")) | ||
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| buffer.WriteString(color.BlueString(fmt.Sprintf("Expected one of: "))) | ||
| for i, t := range nodes.GetAllFuncTypes() { | ||
| if i > 0 { | ||
| buffer.WriteString(color.BlueString(", ")) | ||
| } | ||
| buffer.WriteString(color.BlueString(fmt.Sprintf("\"%s\"", t))) | ||
| } | ||
| buffer.WriteString("\n") | ||
|
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| return buffer.String() | ||
| } |
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