Mercurial > lcfOS
annotate python/ppci/errors.py @ 212:62386bcee1ba
Added parser combinator lib
| author | Windel Bouwman |
|---|---|
| date | Sun, 30 Jun 2013 19:00:41 +0200 |
| parents | 5e391d9a3381 |
| children | c1ccb1cb4cef |
| rev | line source |
|---|---|
| 148 | 1 """ |
| 2 Error handling routines | |
| 3 Diagnostic utils | |
| 4 """ | |
| 5 | |
| 194 | 6 from . import SourceLocation |
| 7 | |
| 152 | 8 class CompilerError(Exception): |
| 200 | 9 def __init__(self, msg, loc=None): |
| 191 | 10 self.msg = msg |
| 11 self.loc = loc | |
| 200 | 12 if loc: |
| 13 assert type(loc) is SourceLocation, '{0} must be SourceLocation'.format(type(loc)) | |
| 191 | 14 def __repr__(self): |
| 200 | 15 if self.loc: |
| 16 return 'Compilererror: "{0}" at row {1}'.format(self.msg, self.loc.row) | |
| 17 else: | |
| 18 return 'Compilererror: "{0}"'.format(self.msg) | |
| 1 | 19 |
| 20 def printError(source, e): | |
| 21 def printLine(row, txt): | |
| 22 print(str(row)+':'+txt) | |
| 148 | 23 if e.loc.row == 0: |
| 1 | 24 print('Error: {0}'.format(e.msg)) |
| 25 else: | |
| 26 lines = source.split('\n') | |
| 148 | 27 ro, co = e.loc.row, e.loc.col |
| 28 prerow = ro - 2 | |
| 1 | 29 if prerow < 1: |
| 30 prerow = 1 | |
| 148 | 31 afterrow = ro + 3 |
| 1 | 32 if afterrow > len(lines): |
| 33 afterrow = len(lines) | |
| 34 | |
| 35 # print preceding source lines: | |
| 148 | 36 for r in range(prerow, ro): |
| 1 | 37 printLine(r, lines[r-1]) |
| 38 # print source line containing error: | |
| 148 | 39 printLine(ro, lines[ro-1]) |
| 40 print(' '*(len(str(ro)+':')+co-1) + '^ Error: {0}'.format(e.msg)) | |
| 1 | 41 # print trailing source line: |
| 148 | 42 for r in range(ro+1, afterrow+1): |
| 1 | 43 printLine(r, lines[r-1]) |
| 148 | 44 |
| 152 | 45 class DiagnosticsManager: |
| 148 | 46 def __init__(self): |
| 47 self.diags = [] | |
| 152 | 48 def addDiag(self, d): |
| 148 | 49 self.diags.append(d) |
| 152 | 50 def error(self, msg, loc): |
| 51 self.addDiag(CompilerError(msg, loc)) | |
| 167 | 52 def clear(self): |
|
182
e9b27f7193e3
Replace clear function by function also supported in python 3.2
Windel Bouwman
parents:
172
diff
changeset
|
53 del self.diags[:] |
| 172 | 54 def printErrors(self, src): |
| 55 if len(self.diags) > 0: | |
| 56 print('{0} Errors'.format(len(self.diags))) | |
| 57 for d in self.diags: | |
| 58 printError(src, d) | |
| 148 | 59 |