feat[next]: friendly errors for more invalid DSL programs - #2661

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havogt wants to merge 11 commits into

GridTools:mainfrom

havogt:next_friendly_errors_coverage

Commits on Jun 16, 2026

fix[next]: DSLError instead of crash for 'global'/'nonlocal' statements
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fix[next]: DSLError for invalid attribute access in field operators
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fix[next]: DSLError for invalid subscripts and dimension indices
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fix[next]: DSLError for unresolvable or invalid type annotations
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fix[next]: DSLError for invalid statements and calls in programs
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style[next]: reformat comparison-chain error into message + hint
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fix[eve]: use identity check for None in infer_type
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fix[next]: DSLError for invalid arguments at call time
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fix[next]: clearer diagnostics for signatures, constants and connectivity misuse
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fix[next]: clear errors for invalid offset providers, dtypes and constructor misuse
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style[next]: lint and typing cleanup for diagnostics work
havogt
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