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Estimated hours taken: 8 Clean up the handling of unbound type variables. Fix a bug with unbound type variables in lambda expressions. Run purity analysis, modechecking etc. even if there were type errors. compiler/mercury_compile.m: Run purity analysis, modechecking etc. even if there were type errors. This fixes a bug (inconsistency between the code and the comments) that seems to have been introduced in stayl's change to mercury_compile.m (revision 1.25) to add intermodule unused argument elimination: the comment said "continue, even if type checking found errors", but the code did not continue. This change was needed to ensure that we still report a warning message about unused type variables for tests/invalid/error2.m; without it, we stop after type checking and don't do purity analysis, and so don't report the warning. compiler/typecheck.m: compiler/purity.m: Move the code for checking for unbound type variables from typecheck.m to purity.m. It needs to be done *after* type inference has been completed, so it can't be done in the ordinary type checking/inference passes. Add code to purity.m to bind the unbound type variables to the builtin type `void'. compiler/polymorphism.m: Comment out old code to bind unbound type variables to `void'; the old code was incomplete, and this is now done in purity.m. compiler/notes/compiler_design.html: Document the above changes. tests/valid/Mmakefile: tests/valid/unbound_tvar_in_lambda.m: Regression test for the above-mentioned bug with unbound type variables in lambda expressions. tests/warnings/singleton_test.exp: tests/invalid/errors2.err_exp: Change the expected warning message for unbound type variables. The error context is not as precise as it used to be, I'm afraid: we only know which function/predicate the error occurred in, not which clause. Also it now comes out in a different order relative to the other error messages. tests/invalid/errors2.err_exp: tests/invalid/funcs_as_preds.err_exp: Add some new error/warning messages that are output now that we run mode and determinism analysis even if there are type errors.
70 lines
4.0 KiB
Plaintext
70 lines
4.0 KiB
Plaintext
errors2.m:009: Error: clause for predicate `errors2:bind_type_param/1'
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errors2.m:009: without preceding `pred' declaration.
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errors2.m:052: In clause for predicate `errors2:type_error_4/0':
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errors2.m:052: warning: variable `X' occurs only once in this scope.
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errors2.m:059: In clause for predicate `errors2:type_error_5/0':
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errors2.m:059: warning: variable `X' occurs only once in this scope.
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errors2.m:065: In clause for predicate `errors2:type_error_6/0':
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errors2.m:065: warning: variable `X' occurs only once in this scope.
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errors2.m:070: In clause for predicate `errors2:type_error_7/0':
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errors2.m:070: warning: variable `Y' occurs only once in this scope.
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errors2.m:071: In clause for predicate `errors2:type_error_7/0':
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errors2.m:071: warning: variables `Z, A, B' occur only once in this scope.
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errors2.m:007: Error: no clauses for predicate `errors2:bind_type_param/2'
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errors2.m:023: Error: no clauses for predicate `errors2:produce_string/1'
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errors2.m:025: Error: no clauses for predicate `errors2:expect_int/1'
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errors2.m:031: In clause for predicate `errors2:type_error/0':
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errors2.m:031: in argument 1 of call to pred `expect_int/1':
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errors2.m:031: type error: variable `X' has type `string',
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errors2.m:031: expected type was `int'.
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errors2.m:037: In clause for predicate `errors2:type_error_2/0':
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errors2.m:037: type error in unification of variable `X'
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errors2.m:037: and variable `Y'.
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errors2.m:037: `X' has type `string',
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errors2.m:037: `Y' has type `int'.
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errors2.m:043: In clause for predicate `errors2:type_error_3/0':
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errors2.m:043: in argument 1 of call to pred `expect_int/1':
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errors2.m:043: type error: variable `Y' has type `string',
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errors2.m:043: expected type was `int'.
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errors2.m:052: In clause for predicate `errors2:type_error_4/0':
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errors2.m:052: in argument 3 of functor `foo_functor/3':
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errors2.m:052: type error in unification of argument
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errors2.m:052: and constant `1.00000000000000'.
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errors2.m:052: argument has type `string',
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errors2.m:052: constant `1.00000000000000' has type `float'.
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errors2.m:059: In clause for predicate `errors2:type_error_5/0':
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errors2.m:059: in argument 3 of functor `foo_functor/3':
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errors2.m:059: type error in unification of argument
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errors2.m:059: and constant `1.00000000000000'.
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errors2.m:059: argument has type `string',
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errors2.m:059: constant `1.00000000000000' has type `float'.
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errors2.m:065: In clause for predicate `errors2:type_error_6/0':
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errors2.m:065: in argument 3 of functor `bar_functor/3':
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errors2.m:065: type error in unification of argument
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errors2.m:065: and constant `1.00000000000000'.
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errors2.m:065: argument has type `string',
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errors2.m:065: constant `1.00000000000000' has type `float'.
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errors2.m:072: In clause for predicate `errors2:type_error_7/0':
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errors2.m:072: in argument 1 of call to pred `expect_int/1':
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errors2.m:072: type error: variable `C' has type `string',
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errors2.m:072: expected type was `int'.
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errors2.m:078: In clause for predicate `errors2:type_error_8/0':
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errors2.m:078: in argument 1 of call to predicate `from_char_list/2':
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errors2.m:078: error: undefined symbol `[]/0'.
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errors2.m:078: In clause for predicate `errors2:type_error_8/0':
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errors2.m:078: error: undefined predicate `from_char_list/2'.
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errors2.m:009: Inferred :- pred bind_type_param(int).
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errors2.m:016: In predicate `errors2:unresolved_polymorphism/0':
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errors2.m:016: warning: unresolved polymorphism.
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errors2.m:016: The variables with unbound types were:
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errors2.m:016: V_2 :: TypeParam
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errors2.m:016: Arg :: TypeParam
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errors2.m:016: The unbound type variable(s) will be implicitly
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errors2.m:016: bound to the builtin type `void'.
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errors2.m:019: In clause for `unresolved_polymorphism':
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errors2.m:019: in argument 1 of call to predicate `errors2:bind_type_param/2':
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errors2.m:019: mode error: variable `Arg' has instantiatedness `free',
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errors2.m:019: expected instantiatedness was `ground'.
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errors2.m:009: Error: no mode declaration for predicate `errors2:bind_type_param/1'.
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For more information, try recompiling with `-E'.
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